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Two hydrogen atoms are in excited state ...

Two hydrogen atoms are in excited state with electrons residing in `n = 2`. First one is moving towards left and emits a photon of energy `E_(1)` towards right. Second one is moving twoards left with same speed and emits a photon of energy `E_(2)` towards left. Taking recoil of nucleus into account during emission process

A

`E_(1) gt E_(2)`

B

`E_(1) lt E_(2)`

C

`E_(1)=E_(2)`

D

information insufficient

Text Solution

Verified by Experts

The correct Answer is:
B

In the first case K.E. of H-atom increases due to recoil whereas in the second case K.E. decreases due to recoil
`:. E_(2) gt E_(1)`
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