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The wavelengths and frequencies of photo...

The wavelengths and frequencies of photons in transition 1,2 and 3 for hydrogen like atom are `lambda_(1),lambda_(2),lambda_(3), v_(1),v_(2)` and `v_(3)` respectively. Then:

A

`v_(3) = v_(1)+v_(2)`

B

`v_(3) +(v_(1)v_(2))/(v_(1)+v_(2))`

C

`lambda_(3) = lambda_(1)+lambda_(2)`

D

`lambda_(3) = (lambda_(1)lambda_(2))/(lambda_(1)+lambda_(2))`

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