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If the electron in a hydrogen atom jumps...

If the electron in a hydrogen atom jumps from an orbit with level `n_(1)=2` to an orbit with level `n_(2)=1` the emitted radiation has a wavelength given by

A

`lamda= 5//3R`

B

`lamda= 4//3R`

C

`lamda= R//4`

D

`lamda= 3R//4`

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