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An electron changes its position from or...

An electron changes its position from orbit `n = 4` to the orbit `n = 2` of an atom. The wavelength of the emitted radiation's is `(R =` Rydberg's constant)

A

`(16)/(R)`

B

`(16)/(3R)`

C

`(16)/(5R)`

D

`(16)/(7R)`

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