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Temperature increase by light absorption

  1. Jul 15, 2015 #1

    I have a question. If a crystal absorbs light and the absorption process leads to some excess energy being released as heat . Can one calculate the temperature rise or an experiment would most certainly need to be done? Apart from the heat capacity of the crystal before light absorption ,what else would one need to know? Any discussion on this would be highly appreciated.


  2. jcsd
  3. Jul 15, 2015 #2
    It will depend upon the power of radiated light, reflection coefficient and heat capacity, if you consider the case of a black body, then the radiated energy is W*t, ΔT = W*t/C, if you want a general case, then the absorbed energy Eabsorbed = (1-ρ)∫W(t)*dt, ρ is the reflection coefficient ΔT = (1-ρ)/C * ∫W(t)*dt
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