NEET | 2016Wave motionHard

Question

Given the value of Rydberg constant is 107 m-1, the wave number of the last line of the Balmer series in hydrogen spectrum will be:

Options

A.

0.025 × 104 m-1

B.

0.5 × 107 m-1

C.

0.25 × 107 m-1

D.

2.5 × 107 m-1

Solution

1λ=R=1h12-1h22
Wavelength = 1λ=R122=R4=1074=0.25×107m-1

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