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Question

Question: The recoil speed of a hydrogen atom after it emits a photon in going from n = 5 state to n = 1 state...

The recoil speed of a hydrogen atom after it emits a photon in going from n = 5 state to n = 1 state is–

A

4.718 ms–1

B

7.418 ms–1

C

4.178 ms–1

D

7.148 ms–1

Answer

4.178 ms–1

Explanation

Solution

P = E/c = mv