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Q.

An electron makes a transition from orbit n = 4 to the orbit n = 2 of a hydrogen atom. The wave number of the emitted radiations (R = Rydberg's constant) will be

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a

163R

b

2R16

c

3R16

d

4R16

answer is C.

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Detailed Solution

Wave number  1λ=R1n12-1n22=R14-116=3R16
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