Radiation in darkness

  • Thread starter gokhul
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  • #1
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Light consists of photon
Photon is carrier of energy
When lights are switched off where had the energy of photon gone
According to law of conservation of energy
Energy can't be destroyed
In darkness, are they any radiation due to conversion of energy??
 

Answers and Replies

  • #2
DaveC426913
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The visible light is absorbed by the walls, heating them up. Often the energy is re-emitted in the infra-red.
 
  • #3
Drakkith
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When lights are switched off where had the energy of photon gone

As Dave said, the energy of the photons already created and in flight when the light is switched off are absorbed by the walls and anything else in line-of-sight of the bulb. After that, well, no more photons are being generated from the light source.
 
  • #4
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As Dave said, the energy of the photons already created and in flight when the light is switched off are absorbed by the walls and anything else in line-of-sight of the bulb. After that, well, no more photons are being generated from the light source.
Photon contains energy ,an energy cant be destroyed or if they are absorbed by walls do they posses any energy or reemit as infra red radiation
 
  • #5
Drakkith
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Photon contains energy ,an energy cant be destroyed or if they are absorbed by walls do they posses any energy or reemit as infra red radiation

The photon no longer exists after absorption. The energy it contained is completely transferred to the wall, so no energy is lost.
 

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