Electrons from n = 2 to n= 1 in hydrogen...

Electrons from n = 2 to n= 1 in hydrogen atom is made to fall on a metal surface with work function 1.2ev. The maximum velocity of photo electrons emitted is nearly equal to

A

`6xx10^(5)` m/s

B

`3xx10^(5)` m/s

C

`2xx10^(5)` m/s

D

`18xx10^(5)` m/s

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The correct Answer is:

D

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