JEE Advanced · PhysicsHard
An electron in a hydrogen atom makes a transition from the state to the state. The recoil velocity of the hydrogen atom is approximately given by which expression, where is the electron mass and is the atom mass?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: A —
Solution
The energy of the emitted photon is . Using and , we find .
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