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Modern Physics

A gas of identical H like atom has some atoms in the lowest(ground)energy level A and some atoms in a particular upper(excited)energy level B and there are no atoms in any other energy level.The atoms of the gas make transition to a higher energy level by absorbing monochromatic light of photon of energy 2.7eV.Subsequently,the atoms emit radiation of only six different photon energies.Some of the emmited photons have energy 2.7eV.Some have more and some have less than 2.7eV.


(i)Find the principal quantum number of initially excited level B.

(ii)Find the ionozation energies of the gas atoms

(iii)Find the maximum and minimum energies of the emmited photons.

Profile image of keval purohit
12 Years agoGrade
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1 Answer

Profile image of Arun Kumar
12 Years ago
Since its 6 different emission

Transition of 2.7eV is 4 to 2
for
n=3
n=1

Now its fairly simple to do all 3 parts.


Arun Kumar
IIT Delhi
Askiitians Faculty