- #1
rayman123
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Homework Statement
'Calculate the recoil energy and velocity of a hydrogen atom in a transition from n=4 to n=1 in which a photon is emitted
Homework Equations
I started with calculating the energy of the emitten photon.
[tex] E_{photon}= \frac{-16.6 eV}{n^2}-\frac{-13.6 eV}{n^2}=\frac{-13.6}{16}+13.6= 12.75 eV[/tex]
The Attempt at a Solution
having calculated the energy of the emitted photon i can calculate its momentum
[tex] p= \frac{E_{photon}}{c}=\frac{2.04\cdot10^{-18}}{3\cdot10^8}=6.81\cdot10^{-27}\frac{kg\cdot m}{s}[/tex]
Homework Statement
can this be relevant? can the emitted photons momentum be so small? how to solve this problem?