Calculate the energy and wavelength of the photon.

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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
 
512
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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:
 

ShawnD

Science Advisor
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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:
ShawnD, Einstein said that
 

ShawnD

Science Advisor
658
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No, Planck said it. That's why they call it "Planck's constant"
 
257
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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
 
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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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