Calculate the energy and wavelength of the photon.

  • Thread starter shezill
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  • #1
shezill
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
 

Answers and Replies

  • #2
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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:
 
  • #3
ShawnD
Science Advisor
668
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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:
  • #4
ShawnD, Einstein said that
 
  • #5
ShawnD
Science Advisor
668
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No, Planck said it. That's why they call it "Planck's constant"
 
  • #6
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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
 
  • #7
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Originally posted by Dimitri Terryn
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.
Ding, ding, ding! That's what Einstein won the Noble Prize for.
 

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