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Homework Help: Calculating number of Photons absorbed by a surface

  1. Jun 17, 2012 #1
    If light with a frequency of 4.41*10^15 Hz falls on a surface that gains 1.13*10^-16 J of energy, how many photons has the surface absorbed?

    Probably simple, I've been using E = hf and such, but I got no idea from there

    Help meeee please
  2. jcsd
  3. Jun 17, 2012 #2
    since you have the frequency of the light, you can calculate the energy of each photon with E = hf. with the energy of each photon and the total energy the surface has absorbed, you can calculate the number of photons by dividing the total energy by the energy of an individual photon.
  4. Jun 18, 2012 #3
    Excellent, thankyou very much
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