How much energy per photon is there in a wavelength of 60 micrometers?

September 2nd, 2009 | by Michael |
energy
Juan C asked:


How much energy per photon is there in a wavelength of 60 micrometers?
How much energy per photon is there in a wavelength of 60 micrometers?
I got 3.31 X 10 ^-21 J / photon

How much energy for one mole of those photons?

NICK

  1. One Response to “How much energy per photon is there in a wavelength of 60 micrometers?”

  2. By skmiadrt on Sep 4, 2009 | Reply

    wavelength = speed of light/frequency
    frequency = c/wavelength = 3E8/60E-6 = 5E12 Hz
    energy = hf = 6.626E-34 Js * 5E12 Hz = 3.31E-21 J/photon

    one mole of photons = 6.02E23 photons
    energy of one mole of photons = 6.02E23*3.31E-21 = 1990 J

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