A hydrogen atom emits a photon corresponding to an electron transition from \( n=5 \) to \( n=1 ... VIDEO
A hydrogen atom emits a photon corresponding to an electron transition from \( n=5 \) to \( n=1 \). The recoil speed of hydrogen atom is almost (mass of proton \( \left.=1.6 \times 10^{-27} \mathrm{~kg}\right) \)
(A) \( 10 \mathrm{~ms}^{-1} \)
(B) \( 2 \times 10^{-2} \mathrm{~ms}^{-1} \)
(C) \( 4 \mathrm{~ms}^{-1} \)
(D) \( 8 \times 10^{2} \mathrm{~ms}^{-1} \)
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