CBSE Class 12 Physics 2023 Outside Delhi Set 2 Paper - Question ...

CBSE Class 12 Physics 2023 Outside Delhi Set 2 Paper

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Question : 2 of 13

Marks: +1, -0

Specify the transition of electron in the wavelength of the line in the Bohr model of hydrogen atom which gives rise to the spectral line of highest wavelength.

$n=3$ to $n=1$
$n=3$ to $n=2$
$n=4$ to $n=1$
$n=4$ to $n=2$

Solution:

By using the formula

\;{1}/{λ}=R (\;{1}/{n_1^2}-\;{1}/{n_2^2})

For (A),

λ=\;{1.125}/{ {\R}}

For (B),

λ=\;{7.2}/{ {\R}}

For (C),

λ=\;{1.1}/{ {\R}}

For (D),

λ=\;{5.3}/{ {\R}}

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