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Calculate the energy and wavelength of the photon.

  1. Jun 18, 2003 #1
    An atom has an energy level 1.8 eV above ground state. When excited, it returns to the ground state and emits a photn. Ccalculate the energy and wavelength of the photon.

    help me please
    thank you
     
  2. jcsd
  3. Jun 19, 2003 #2
    Well if you ask like this, I think it's like in Homework Help: You would learn nothing from a direct answer.
    So here's a hint: How, do you think, has it been found out that the energy level is actually 1.8 eV? :wink:
     
  4. Jun 23, 2003 #3

    ShawnD

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    Planck said that the energy of a photon is directly related to the frequency of the photon. We can express that as E = hf where h means Planck's constant.
     
    Last edited: Jun 23, 2003
  5. Jun 23, 2003 #4
    ShawnD, Einstein said that
     
  6. Jun 24, 2003 #5

    ShawnD

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    No, Planck said it. That's why they call it "Planck's constant"
     
  7. Jun 24, 2003 #6
    Nope, it was Einstein who came up with the whole "photon" thing in his paper on the photo-eletric effect, which got him the Nobel Price.

    For many years, Planck simply didn't buy the idea
     
  8. Jun 25, 2003 #7
    Ding, ding, ding! That's what Einstein won the Noble Prize for.
     
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