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Q.

Monochromatic radiations of wavelength A are incident on a hydrogen sample in ground state. Hydrogen atom absorb the light and subsequently emits radiations of 10 different wavelengths. The value of A is nearly :

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a

203 nm

b

95 nm

c

73 nm

d

80 nm

answer is B.

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Detailed Solution

Here, the value of n,

$\frac{n (n - 1)}{2} = 10$

$\Rightarrow n = 5$

$\frac{1}{λ} = R_{H} [\frac{1}{1^{2}} - \frac{1}{5^{2}}]$

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