Energy of visible light

  • Thread starter s0610038
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  • #1
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Hey guys, it is possible that to observe the energy outcome of visible light?
By adding colored frame in front of the light source and shined on a beaker with water
Using data logger to record the data, how long should I take the experiment? Thanks for helping
 

Answers and Replies

  • #2
BruceW
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This experiment would measure how easily a particular wavelength of light is absorbed by the water, not how much energy the photon contains.
 
  • #3
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By using the specific heat capacity theory.. C=J/m x change of temp
By doing that experiment I have the data if specific heat capacity of water, and the mass of water before I started the experiment.
The change of temperature will be determined by the data logger during the experiment.
Can I obtain the energy by using this formula? Thanks
 
  • #4
BruceW
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Yes, I think that would work (assuming no energy is lost as heat to surroundings), and it gives the energy of light absorbed by the water (not total incident light energy)
 
  • #5
Drakkith
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The problem with your water is that alot of the light will still pass through it. I would say it would be better to replace it with something solid and non-reflective, OR change your experiment up and do something like the photoelectric experiment.
 
  • #6
SpectraCat
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You can try the experiment, but I doubt you will see much. Why are you expecting water to absorb enough visible light to register a change in temperature?
 

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