Question
Question: When the hydrogen atom emits a photon in going from n = 5 to n = 1 state, its recoil speed is nearly...
When the hydrogen atom emits a photon in going from n = 5 to n = 1 state, its recoil speed is nearly-
A
10–4 m/s
B
2 × 10–2 m/s
C
4 m/s
D
8 × 102 m/s
Answer
4 m/s
Explanation
Solution
p = f/c, mv = E/c