Q157 / 160 · AP EAMCET 2017 (25 Apr Shift 2) · Physics

A stationary hydrogen atom emits a photon corresponding to first line of Lyman series. Recoil velocity of the atom is nearly

A
$3.2 \mathrm{~ms}^{-1}$
Correct answer
B
$0.63 \mathrm{~ms}^{-1}$
C
$8.2 \mathrm{~ms}^{-1}$
D
$0.1 \mathrm{~ms}^{-1}$

Hence, the correct answer is option: 'B'.

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