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Questions  

If R is the Rydberg's constant for hydrogen, then the wave number of the first line in the Lyman series will be

a
R4
b
3R4
c
R2
d
2R

detailed solution

Correct option is B

For Lyman seriesv¯=1λ=R112−1n2 here  n=2,3,4,5...For  first  linev¯=R112−122⇒v¯=R1−14=3R4

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