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Q.

The wavelength of the first line in Balmer series in the hydrogen spectrum is $λ$ . What is the wavelength of the second line ?

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a

$\frac{3 λ}{16}$

b

$\frac{20 λ}{27}$

c

$\frac{5 λ}{36}$

d

$\frac{3 λ}{4}$

answer is A.

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Detailed Solution

$\frac{1}{λ} = R (\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}})$

first line n₂=3 n₁=2 second line n₂=4 n₁=2

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