Symfony Profiler

Security

Token

There is no security token.

Firewall

main Name

Security enabled

Stateless

Configuration

Key	Value
provider	security.user.provider.concrete.app_user_provider
context	main
entry_point	App\Security\KbinAuthenticator
user_checker	App\Security\UserChecker
access_denied_handler	(none)
access_denied_url	(none)
authenticators	[`"two_factor" "remember_me" "App\Security\KbinAuthenticator" "App\Security\FacebookAuthenticator" "App\Security\GoogleAuthenticator" "App\Security\GithubAuthenticator" "App\Security\KeycloakAuthenticator"`]

Listeners

Listener	Duration	Response
Symfony\Component\Security\Http\Firewall\ChannelListener {#723`-map: Symfony\Component\Security\Http\AccessMap {#722 …} -logger: Monolog\Logger {#783 …} -httpPort: 80 -httpsPort: 443`}	0.00 ms	(none)
Symfony\Component\Security\Http\Firewall\ContextListener {#706-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …} -sessionKey: "_security_main" -logger: Monolog\Logger {#783 …} -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …} -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …} -registered: false -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …} -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}}	4.42 ms	(none)
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584`-authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}`}	0.00 ms	(none)
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582`-twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …} -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}`}	0.05 ms	(none)
Symfony\Component\Security\Http\Firewall\AccessListener {#579`-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …} -map: Symfony\Component\Security\Http\AccessMap {#722 …}`}	0.00 ms	(none)
Symfony\Component\Security\Http\Firewall\LogoutListener {#786`-tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …} -options: [ "csrf_parameter" => "_csrf_token" "csrf_token_id" => "logout" "logout_path" => "app_logout" ] -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …} -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …} -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}`}	0.00 ms	(none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy


"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
"App\Security\Voter\EntryCommentVoter"
"App\Security\Voter\EntryVoter"
"App\Security\Voter\MagazineVoter"
"App\Security\Voter\MessageThreadVoter"
"App\Security\Voter\MessageVoter"
"App\Security\Voter\NotificationVoter"
"App\Security\Voter\OAuth2UserConsentVoter"
"App\Security\Voter\PostCommentVoter"
"App\Security\Voter\PostVoter"
"App\Security\Voter\UserVoter"

#	Voter class
1	"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2	"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3	"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4	"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5	"App\Security\Voter\EntryCommentVoter"
6	"App\Security\Voter\EntryVoter"
7	"App\Security\Voter\MagazineVoter"
8	"App\Security\Voter\MessageThreadVoter"
9	"App\Security\Voter\MessageVoter"
10	"App\Security\Voter\NotificationVoter"
11	"App\Security\Voter\OAuth2UserConsentVoter"
12	"App\Security\Voter\PostCommentVoter"
13	"App\Security\Voter\PostVoter"
14	"App\Security\Voter\UserVoter"

Access decision log


null
"App\Security\Voter\UserVoter"
App\Entity\EntryComment {#1374
  +user: Proxies\__CG__\App\Entity\User {#1370 …}
  +entry: App\Entity\Entry {#1832 …}
  +magazine: App\Entity\Magazine {#313
    +icon: Proxies\__CG__\App\Entity\Image {#294 …}
    +name: "science_memes@mander.xyz"
    +title: "science_memes"
    +description: """
      Welcome to c/science_memes @ Mander.xyz!\n
      =========================================\n
      \n
      > A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.\n
      \n
      ![](https://mander.xyz/pictrs/image/139561f5-2f4d-48a6-aef0-65943d6d97d3.png)\n
      \n
      ---\n
      \n
      ---\n
      \n
      **Rules**\n
      \n
      1. Don’t throw mud. Behave like an intellectual and remember the human.\n
      2. Keep it rooted (on topic).\n
      3. No spam.\n
      4. Infographics welcome, get schooled.\n
      \n
      ---\n
      \n
      ---\n
      \n
      Research Committee\n
      ------------------\n
      \n
      - [!spiders@lemmy.world](/c/spiders@lemmy.world)\n
      \n
      Other Mander Communities\n
      ------------------------\n
      \n
      ### Science and Research\n
      \n
      - [!academia@mander.xyz](/c/academia@mander.xyz)\n
      - [!science@mander.xyz](/c/science@mander.xyz)\n
      - [!scicomm@mander.xyz](/c/scicomm@mander.xyz)\n
      \n
      ### Biology and Life Sciences\n
      \n
      - [!abiogenesis@mander.xyz](/c/abiogenesis@mander.xyz)\n
      - [!animal-behavior@mander.xyz](/c/animal-behavior@mander.xyz)\n
      - [!anthropology@mander.xyz](/c/anthropology@mander.xyz)\n
      - [!arachnology@mander.xyz](/c/arachnology@mander.xyz)\n
      - [!balconygardening@slrpnk.net](/c/balconygardening@slrpnk.net)\n
      - [!biodiversity@mander.xyz](/c/biodiversity@mander.xyz)\n
      - [!biology@mander.xyz](/c/biology@mander.xyz)\n
      - [!biophysics@mander.xyz](/c/biophysics@mander.xyz)\n
      - [!botany@mander.xyz](/c/botany@mander.xyz)\n
      - [!ecology@mander.xyz](/c/ecology@mander.xyz)\n
      - [!entomology@mander.xyz](/c/entomology@mander.xyz)\n
      - [!fermentation@mander.xyz](/c/fermentation@mander.xyz)\n
      - [!herpetology@mander.xyz](/c/herpetology@mander.xyz)\n
      - [!houseplants@mander.xyz](/c/houseplants@mander.xyz)\n
      - [!medicine@mander.xyz](/c/medicine@mander.xyz)\n
      - [!microscopy@mander.xyz](/c/microscopy@mander.xyz)\n
      - [!mycology@mander.xyz](/c/mycology@mander.xyz)\n
      - [!nudibranchs@mander.xyz](/c/nudibranchs@mander.xyz)\n
      - [!nutrition@mander.xyz](/c/nutrition@mander.xyz)\n
      - [!palaeoecology@mander.xyz](/c/palaeoecology@mander.xyz)\n
      - [!palaeontology@mander.xyz](/c/palaeontology@mander.xyz)\n
      - [!photosynthesis@mander.xyz](/c/photosynthesis@mander.xyz)\n
      - [!plantid@mander.xyz](/c/plantid@mander.xyz)\n
      - [!plants@mander.xyz](/c/plants@mander.xyz)\n
      - [!reptiles and amphibians@mander.xyz](/c/herpetology@mander.xyz)\n
      \n
      ### Physical Sciences\n
      \n
      - [!astronomy@mander.xyz](/c/astronomy@mander.xyz)\n
      - [!chemistry@mander.xyz](/c/chemistry@mander.xyz)\n
      - [!earthscience@mander.xyz](/c/earthscience@mander.xyz)\n
      - [!geography@mander.xyz](/c/geography@mander.xyz)\n
      - [!geospatial@mander.xyz](/c/geospatial@mander.xyz)\n
      - [!nuclear@mander.xyz](/c/nuclear@mander.xyz)\n
      - [!physics@mander.xyz](/c/physics@mander.xyz)\n
      - [!quantum-computing@mander.xyz](/c/qubits@mander.xyz)\n
      - [!spectroscopy@mander.xyz](/c/spectroscopy@mander.xyz)\n
      \n
      ### Humanities and Social Sciences\n
      \n
      - [!archaeology@mander.xyz](/c/archaeology@mander.xyz)\n
      - [!folklore@mander.xyz](/c/folklore@mander.xyz)\n
      - [!history@mander.xyz](/c/history@mander.xyz)\n
      - [!old_maps@mander.xyz](/c/old_maps@mander.xyz)\n
      \n
      ### Practical and Applied Sciences\n
      \n
      - [!exercise-and sports-science@mander.xyz](/c/sports_science@mander.xyz)\n
      - [!gardening@mander.xyz](/c/gardening@mander.xyz)\n
      - [!self sufficiency@mander.xyz](/c/self-sufficiency@mander.xyz)\n
      - [!soilscience@slrpnk.net](/c/soilscience@slrpnk.net)\n
      - [!terrariums@mander.xyz](/c/terrariums@mander.xyz)\n
      - [!timelapse@mander.xyz](/c/timelapse@mander.xyz)\n
      \n
      ### Memes\n
      \n
      - [!bushrat_confidential@slrpnk.net](/c/bushrat_confidential@slrpnk.net)\n
      - [!science_memes@mander.xyz](/c/science_memes@mander.xyz)\n
      \n
      ### Miscellaneous\n
      \n
      - [!answered@mander.xyz](/c/answered@mander.xyz)\n
      - [!mander@mander.xyz](/c/mander@mander.xyz)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 468
    +entryCommentCount: 7202
    +postCount: 0
    +postCommentCount: 0
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729517971 {#321
      date: 2024-10-21 15:39:31.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#285 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#281 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#270 …}
    +entries: Doctrine\ORM\PersistentCollection {#228 …}
    +posts: Doctrine\ORM\PersistentCollection {#186 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#248 …}
    +bans: Doctrine\ORM\PersistentCollection {#165 …}
    +reports: Doctrine\ORM\PersistentCollection {#151 …}
    +badges: Doctrine\ORM\PersistentCollection {#129 …}
    +logs: Doctrine\ORM\PersistentCollection {#119 …}
    +awards: Doctrine\ORM\PersistentCollection {#108 …}
    +categories: Doctrine\ORM\PersistentCollection {#95 …}
    -id: 50
    +apId: "science_memes@mander.xyz"
    +apProfileId: "https://mander.xyz/c/science_memes"
    +apPublicUrl: "https://mander.xyz/c/science_memes"
    +apFollowersUrl: "https://mander.xyz/c/science_memes/followers"
    +apInboxUrl: "https://mander.xyz/inbox"
    +apDomain: "mander.xyz"
    +apPreferredUsername: "science_memes"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1728429632 {#322
      date: 2024-10-09 01:20:32.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1697180553 {#316
      date: 2023-10-13 09:02:33.0 +02:00
    }
  }
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2356 …}
  +body: """
    Light doesn’t travel the same speed in water or glass as in a vacuum.\n
    \n
    > In a medium, light usually does not propagate at a speed equal to c; further, different types of light wave will travel at different speeds. The speed at which the individual crests and troughs of a plane wave (a wave filling the whole space, with only one frequency) propagate is called the phase velocity vp. A physical signal with a finite extent (a pulse of light) travels at a different speed. The overall envelope of the pulse travels at the group velocity vg, and its earliest part travels at the front velocity vf.\n
    \n
    [en.wikipedia.org/wiki/Speed_of_light#In_a_medium](https://en.wikipedia.org/wiki/Speed_of_light#In_a_medium)
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 6
  +score: 0
  +lastActive: DateTime @1700424493 {#1605
    date: 2023-11-19 21:08:13.0 +01:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@fossilesque@mander.xyz"
    "@Tb0n3@sh.itjust.works"
    "@trash80@lemmy.dbzer0.com"
    "@ziggurism@lemmy.world"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2466 …}
  +nested: Doctrine\ORM\PersistentCollection {#2288 …}
  +votes: Doctrine\ORM\PersistentCollection {#2446 …}
  +reports: Doctrine\ORM\PersistentCollection {#2439 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2489 …}
  +notifications: Doctrine\ORM\PersistentCollection {#60 …}
  -id: 140757
  -bodyTs: "'/wiki/speed_of_light#in_a_medium](https://en.wikipedia.org/wiki/speed_of_light#in_a_medium)':111 'c':29 'call':66 'crest':47 'differ':31,39,85 'doesn':2 'earliest':101 'en.wikipedia.org':110 'en.wikipedia.org/wiki/speed_of_light#in_a_medium](https://en.wikipedia.org/wiki/speed_of_light#in_a_medium)':109 'envelop':89 'equal':27 'extent':77 'fill':56 'finit':76 'frequenc':63 'front':106 'glass':11 'group':96 'individu':46 'light':1,19,34,81 'medium':18 'one':62 'overal':88 'part':102 'phase':68 'physic':72 'plane':52 'propag':23,64 'puls':79,92 'signal':73 'space':59 'speed':7,26,40,42,86 'travel':4,37,82,93,103 'trough':49 'type':32 'usual':20 'vacuum':15 'veloc':69,97,107 'vf':108 'vg':98 'vp':70 'water':9 'wave':35,53,55 'whole':58"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://lemmy.dbzer0.com/comment/5244213"
  +editedAt: null
  +createdAt: DateTimeImmutable @1700424493 {#1969
    date: 2023-11-19 21:08:13.0 +01:00
  }
}
"App\Security\Voter\UserVoter"
App\Entity\EntryComment {#1374
  +user: Proxies\__CG__\App\Entity\User {#1370 …}
  +entry: App\Entity\Entry {#1832 …}
  +magazine: App\Entity\Magazine {#313
    +icon: Proxies\__CG__\App\Entity\Image {#294 …}
    +name: "science_memes@mander.xyz"
    +title: "science_memes"
    +description: """
      Welcome to c/science_memes @ Mander.xyz!\n
      =========================================\n
      \n
      > A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.\n
      \n
      ![](https://mander.xyz/pictrs/image/139561f5-2f4d-48a6-aef0-65943d6d97d3.png)\n
      \n
      ---\n
      \n
      ---\n
      \n
      **Rules**\n
      \n
      1. Don’t throw mud. Behave like an intellectual and remember the human.\n
      2. Keep it rooted (on topic).\n
      3. No spam.\n
      4. Infographics welcome, get schooled.\n
      \n
      ---\n
      \n
      ---\n
      \n
      Research Committee\n
      ------------------\n
      \n
      - [!spiders@lemmy.world](/c/spiders@lemmy.world)\n
      \n
      Other Mander Communities\n
      ------------------------\n
      \n
      ### Science and Research\n
      \n
      - [!academia@mander.xyz](/c/academia@mander.xyz)\n
      - [!science@mander.xyz](/c/science@mander.xyz)\n
      - [!scicomm@mander.xyz](/c/scicomm@mander.xyz)\n
      \n
      ### Biology and Life Sciences\n
      \n
      - [!abiogenesis@mander.xyz](/c/abiogenesis@mander.xyz)\n
      - [!animal-behavior@mander.xyz](/c/animal-behavior@mander.xyz)\n
      - [!anthropology@mander.xyz](/c/anthropology@mander.xyz)\n
      - [!arachnology@mander.xyz](/c/arachnology@mander.xyz)\n
      - [!balconygardening@slrpnk.net](/c/balconygardening@slrpnk.net)\n
      - [!biodiversity@mander.xyz](/c/biodiversity@mander.xyz)\n
      - [!biology@mander.xyz](/c/biology@mander.xyz)\n
      - [!biophysics@mander.xyz](/c/biophysics@mander.xyz)\n
      - [!botany@mander.xyz](/c/botany@mander.xyz)\n
      - [!ecology@mander.xyz](/c/ecology@mander.xyz)\n
      - [!entomology@mander.xyz](/c/entomology@mander.xyz)\n
      - [!fermentation@mander.xyz](/c/fermentation@mander.xyz)\n
      - [!herpetology@mander.xyz](/c/herpetology@mander.xyz)\n
      - [!houseplants@mander.xyz](/c/houseplants@mander.xyz)\n
      - [!medicine@mander.xyz](/c/medicine@mander.xyz)\n
      - [!microscopy@mander.xyz](/c/microscopy@mander.xyz)\n
      - [!mycology@mander.xyz](/c/mycology@mander.xyz)\n
      - [!nudibranchs@mander.xyz](/c/nudibranchs@mander.xyz)\n
      - [!nutrition@mander.xyz](/c/nutrition@mander.xyz)\n
      - [!palaeoecology@mander.xyz](/c/palaeoecology@mander.xyz)\n
      - [!palaeontology@mander.xyz](/c/palaeontology@mander.xyz)\n
      - [!photosynthesis@mander.xyz](/c/photosynthesis@mander.xyz)\n
      - [!plantid@mander.xyz](/c/plantid@mander.xyz)\n
      - [!plants@mander.xyz](/c/plants@mander.xyz)\n
      - [!reptiles and amphibians@mander.xyz](/c/herpetology@mander.xyz)\n
      \n
      ### Physical Sciences\n
      \n
      - [!astronomy@mander.xyz](/c/astronomy@mander.xyz)\n
      - [!chemistry@mander.xyz](/c/chemistry@mander.xyz)\n
      - [!earthscience@mander.xyz](/c/earthscience@mander.xyz)\n
      - [!geography@mander.xyz](/c/geography@mander.xyz)\n
      - [!geospatial@mander.xyz](/c/geospatial@mander.xyz)\n
      - [!nuclear@mander.xyz](/c/nuclear@mander.xyz)\n
      - [!physics@mander.xyz](/c/physics@mander.xyz)\n
      - [!quantum-computing@mander.xyz](/c/qubits@mander.xyz)\n
      - [!spectroscopy@mander.xyz](/c/spectroscopy@mander.xyz)\n
      \n
      ### Humanities and Social Sciences\n
      \n
      - [!archaeology@mander.xyz](/c/archaeology@mander.xyz)\n
      - [!folklore@mander.xyz](/c/folklore@mander.xyz)\n
      - [!history@mander.xyz](/c/history@mander.xyz)\n
      - [!old_maps@mander.xyz](/c/old_maps@mander.xyz)\n
      \n
      ### Practical and Applied Sciences\n
      \n
      - [!exercise-and sports-science@mander.xyz](/c/sports_science@mander.xyz)\n
      - [!gardening@mander.xyz](/c/gardening@mander.xyz)\n
      - [!self sufficiency@mander.xyz](/c/self-sufficiency@mander.xyz)\n
      - [!soilscience@slrpnk.net](/c/soilscience@slrpnk.net)\n
      - [!terrariums@mander.xyz](/c/terrariums@mander.xyz)\n
      - [!timelapse@mander.xyz](/c/timelapse@mander.xyz)\n
      \n
      ### Memes\n
      \n
      - [!bushrat_confidential@slrpnk.net](/c/bushrat_confidential@slrpnk.net)\n
      - [!science_memes@mander.xyz](/c/science_memes@mander.xyz)\n
      \n
      ### Miscellaneous\n
      \n
      - [!answered@mander.xyz](/c/answered@mander.xyz)\n
      - [!mander@mander.xyz](/c/mander@mander.xyz)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 468
    +entryCommentCount: 7202
    +postCount: 0
    +postCommentCount: 0
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    +lastActive: DateTime @1729517971 {#321
      date: 2024-10-21 15:39:31.0 +02:00
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    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#285 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#281 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#270 …}
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    +posts: Doctrine\ORM\PersistentCollection {#186 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#248 …}
    +bans: Doctrine\ORM\PersistentCollection {#165 …}
    +reports: Doctrine\ORM\PersistentCollection {#151 …}
    +badges: Doctrine\ORM\PersistentCollection {#129 …}
    +logs: Doctrine\ORM\PersistentCollection {#119 …}
    +awards: Doctrine\ORM\PersistentCollection {#108 …}
    +categories: Doctrine\ORM\PersistentCollection {#95 …}
    -id: 50
    +apId: "science_memes@mander.xyz"
    +apProfileId: "https://mander.xyz/c/science_memes"
    +apPublicUrl: "https://mander.xyz/c/science_memes"
    +apFollowersUrl: "https://mander.xyz/c/science_memes/followers"
    +apInboxUrl: "https://mander.xyz/inbox"
    +apDomain: "mander.xyz"
    +apPreferredUsername: "science_memes"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1728429632 {#322
      date: 2024-10-09 01:20:32.0 +02:00
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    +apDeletedAt: null
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    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1697180553 {#316
      date: 2023-10-13 09:02:33.0 +02:00
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  }
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2356 …}
  +body: """
    Light doesn’t travel the same speed in water or glass as in a vacuum.\n
    \n
    > In a medium, light usually does not propagate at a speed equal to c; further, different types of light wave will travel at different speeds. The speed at which the individual crests and troughs of a plane wave (a wave filling the whole space, with only one frequency) propagate is called the phase velocity vp. A physical signal with a finite extent (a pulse of light) travels at a different speed. The overall envelope of the pulse travels at the group velocity vg, and its earliest part travels at the front velocity vf.\n
    \n
    [en.wikipedia.org/wiki/Speed_of_light#In_a_medium](https://en.wikipedia.org/wiki/Speed_of_light#In_a_medium)
    """
  +lang: "en"
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  +lastActive: DateTime @1700424493 {#1605
    date: 2023-11-19 21:08:13.0 +01:00
  }
  +ip: null
  +tags: null
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    +name: "science_memes@mander.xyz"
    +title: "science_memes"
    +description: """
      Welcome to c/science_memes @ Mander.xyz!\n
      =========================================\n
      \n
      > A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.\n
      \n
      ![](https://mander.xyz/pictrs/image/139561f5-2f4d-48a6-aef0-65943d6d97d3.png)\n
      \n
      ---\n
      \n
      ---\n
      \n
      **Rules**\n
      \n
      1. Don’t throw mud. Behave like an intellectual and remember the human.\n
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      \n
      ---\n
      \n
      ---\n
      \n
      Research Committee\n
      ------------------\n
      \n
      - [!spiders@lemmy.world](/c/spiders@lemmy.world)\n
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      Other Mander Communities\n
      ------------------------\n
      \n
      ### Science and Research\n
      \n
      - [!academia@mander.xyz](/c/academia@mander.xyz)\n
      - [!science@mander.xyz](/c/science@mander.xyz)\n
      - [!scicomm@mander.xyz](/c/scicomm@mander.xyz)\n
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      ### Biology and Life Sciences\n
      \n
      - [!abiogenesis@mander.xyz](/c/abiogenesis@mander.xyz)\n
      - [!animal-behavior@mander.xyz](/c/animal-behavior@mander.xyz)\n
      - [!anthropology@mander.xyz](/c/anthropology@mander.xyz)\n
      - [!arachnology@mander.xyz](/c/arachnology@mander.xyz)\n
      - [!balconygardening@slrpnk.net](/c/balconygardening@slrpnk.net)\n
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      - [!biophysics@mander.xyz](/c/biophysics@mander.xyz)\n
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      - [!herpetology@mander.xyz](/c/herpetology@mander.xyz)\n
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      - [!medicine@mander.xyz](/c/medicine@mander.xyz)\n
      - [!microscopy@mander.xyz](/c/microscopy@mander.xyz)\n
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      - [!nudibranchs@mander.xyz](/c/nudibranchs@mander.xyz)\n
      - [!nutrition@mander.xyz](/c/nutrition@mander.xyz)\n
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      - [!reptiles and amphibians@mander.xyz](/c/herpetology@mander.xyz)\n
      \n
      ### Physical Sciences\n
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      - [!astronomy@mander.xyz](/c/astronomy@mander.xyz)\n
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      - [!quantum-computing@mander.xyz](/c/qubits@mander.xyz)\n
      - [!spectroscopy@mander.xyz](/c/spectroscopy@mander.xyz)\n
      \n
      ### Humanities and Social Sciences\n
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      - [!archaeology@mander.xyz](/c/archaeology@mander.xyz)\n
      - [!folklore@mander.xyz](/c/folklore@mander.xyz)\n
      - [!history@mander.xyz](/c/history@mander.xyz)\n
      - [!old_maps@mander.xyz](/c/old_maps@mander.xyz)\n
      \n
      ### Practical and Applied Sciences\n
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      - [!exercise-and sports-science@mander.xyz](/c/sports_science@mander.xyz)\n
      - [!gardening@mander.xyz](/c/gardening@mander.xyz)\n
      - [!self sufficiency@mander.xyz](/c/self-sufficiency@mander.xyz)\n
      - [!soilscience@slrpnk.net](/c/soilscience@slrpnk.net)\n
      - [!terrariums@mander.xyz](/c/terrariums@mander.xyz)\n
      - [!timelapse@mander.xyz](/c/timelapse@mander.xyz)\n
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      ### Memes\n
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      - [!bushrat_confidential@slrpnk.net](/c/bushrat_confidential@slrpnk.net)\n
      - [!science_memes@mander.xyz](/c/science_memes@mander.xyz)\n
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      ### Miscellaneous\n
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      - [!answered@mander.xyz](/c/answered@mander.xyz)\n
      - [!mander@mander.xyz](/c/mander@mander.xyz)
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    Light doesn’t travel the same speed in water or glass as in a vacuum.\n
    \n
    > In a medium, light usually does not propagate at a speed equal to c; further, different types of light wave will travel at different speeds. The speed at which the individual crests and troughs of a plane wave (a wave filling the whole space, with only one frequency) propagate is called the phase velocity vp. A physical signal with a finite extent (a pulse of light) travels at a different speed. The overall envelope of the pulse travels at the group velocity vg, and its earliest part travels at the front velocity vf.\n
    \n
    [en.wikipedia.org/wiki/Speed_of_light#In_a_medium](https://en.wikipedia.org/wiki/Speed_of_light#In_a_medium)
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    Welcome to c/science_memes @ Mander.xyz!\n
    =========================================\n
    \n
    > A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.\n
    \n
    ![](https://mander.xyz/pictrs/image/139561f5-2f4d-48a6-aef0-65943d6d97d3.png)\n
    \n
    ---\n
    \n
    ---\n
    \n
    **Rules**\n
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    3. No spam.\n
    4. Infographics welcome, get schooled.\n
    \n
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    \n
    ---\n
    \n
    Research Committee\n
    ------------------\n
    \n
    - [!spiders@lemmy.world](/c/spiders@lemmy.world)\n
    \n
    Other Mander Communities\n
    ------------------------\n
    \n
    ### Science and Research\n
    \n
    - [!academia@mander.xyz](/c/academia@mander.xyz)\n
    - [!science@mander.xyz](/c/science@mander.xyz)\n
    - [!scicomm@mander.xyz](/c/scicomm@mander.xyz)\n
    \n
    ### Biology and Life Sciences\n
    \n
    - [!abiogenesis@mander.xyz](/c/abiogenesis@mander.xyz)\n
    - [!animal-behavior@mander.xyz](/c/animal-behavior@mander.xyz)\n
    - [!anthropology@mander.xyz](/c/anthropology@mander.xyz)\n
    - [!arachnology@mander.xyz](/c/arachnology@mander.xyz)\n
    - [!balconygardening@slrpnk.net](/c/balconygardening@slrpnk.net)\n
    - [!biodiversity@mander.xyz](/c/biodiversity@mander.xyz)\n
    - [!biology@mander.xyz](/c/biology@mander.xyz)\n
    - [!biophysics@mander.xyz](/c/biophysics@mander.xyz)\n
    - [!botany@mander.xyz](/c/botany@mander.xyz)\n
    - [!ecology@mander.xyz](/c/ecology@mander.xyz)\n
    - [!entomology@mander.xyz](/c/entomology@mander.xyz)\n
    - [!fermentation@mander.xyz](/c/fermentation@mander.xyz)\n
    - [!herpetology@mander.xyz](/c/herpetology@mander.xyz)\n
    - [!houseplants@mander.xyz](/c/houseplants@mander.xyz)\n
    - [!medicine@mander.xyz](/c/medicine@mander.xyz)\n
    - [!microscopy@mander.xyz](/c/microscopy@mander.xyz)\n
    - [!mycology@mander.xyz](/c/mycology@mander.xyz)\n
    - [!nudibranchs@mander.xyz](/c/nudibranchs@mander.xyz)\n
    - [!nutrition@mander.xyz](/c/nutrition@mander.xyz)\n
    - [!palaeoecology@mander.xyz](/c/palaeoecology@mander.xyz)\n
    - [!palaeontology@mander.xyz](/c/palaeontology@mander.xyz)\n
    - [!photosynthesis@mander.xyz](/c/photosynthesis@mander.xyz)\n
    - [!plantid@mander.xyz](/c/plantid@mander.xyz)\n
    - [!plants@mander.xyz](/c/plants@mander.xyz)\n
    - [!reptiles and amphibians@mander.xyz](/c/herpetology@mander.xyz)\n
    \n
    ### Physical Sciences\n
    \n
    - [!astronomy@mander.xyz](/c/astronomy@mander.xyz)\n
    - [!chemistry@mander.xyz](/c/chemistry@mander.xyz)\n
    - [!earthscience@mander.xyz](/c/earthscience@mander.xyz)\n
    - [!geography@mander.xyz](/c/geography@mander.xyz)\n
    - [!geospatial@mander.xyz](/c/geospatial@mander.xyz)\n
    - [!nuclear@mander.xyz](/c/nuclear@mander.xyz)\n
    - [!physics@mander.xyz](/c/physics@mander.xyz)\n
    - [!quantum-computing@mander.xyz](/c/qubits@mander.xyz)\n
    - [!spectroscopy@mander.xyz](/c/spectroscopy@mander.xyz)\n
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    ### Humanities and Social Sciences\n
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    - [!archaeology@mander.xyz](/c/archaeology@mander.xyz)\n
    - [!folklore@mander.xyz](/c/folklore@mander.xyz)\n
    - [!history@mander.xyz](/c/history@mander.xyz)\n
    - [!old_maps@mander.xyz](/c/old_maps@mander.xyz)\n
    \n
    ### Practical and Applied Sciences\n
    \n
    - [!exercise-and sports-science@mander.xyz](/c/sports_science@mander.xyz)\n
    - [!gardening@mander.xyz](/c/gardening@mander.xyz)\n
    - [!self sufficiency@mander.xyz](/c/self-sufficiency@mander.xyz)\n
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    - [!terrariums@mander.xyz](/c/terrariums@mander.xyz)\n
    - [!timelapse@mander.xyz](/c/timelapse@mander.xyz)\n
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    - [!bushrat_confidential@slrpnk.net](/c/bushrat_confidential@slrpnk.net)\n
    - [!science_memes@mander.xyz](/c/science_memes@mander.xyz)\n
    \n
    ### Miscellaneous\n
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    - [!answered@mander.xyz](/c/answered@mander.xyz)\n
    - [!mander@mander.xyz](/c/mander@mander.xyz)
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