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Q.

The masses of photons corresponding to the first lines of the Lyman and the Balmer series of the atomic spectrum of hydrogen are in the ratio of 

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a

5 : 27 

b

27 : 5

c

4 : 1

d

1 : 4

answer is B.

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Detailed Solution

ΔE=mc2

For Lymannseries,  m1c2 α(1/12−1/22)

For Balmer series,  m2c2 α(1/22−1/32)

m1/m2=3×36/4×5

m,:m2=27:5

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