An electron in the H atom makes a transition from n = 3 to n = 1 . The recoil momentum of the H atom will be

Question

An electron in the H atom makes a transition from n = 3 to n = 1 . The recoil momentum of the H atom will be, 6.45 × 1 0 - 27 N s, 6.8 × 1 0 - 27 N s, 6.45 × 1 0 - 24 N s, 6.8 × 1 0 - 24 N s

MARKS App · Accepted Answer

Energy of photon emitted E = 13.6 1 2 - 13.6 3 2 E = 12.09 e V Momentum of photon, E c = 12.09 × 1.6 × 1 0 - 19 3 × 1 0 8 N s ⁡ = 6.45 × 1 0 - 27 N s Same will be the magnitude of recoil momentum of H atom

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