When a hydrogen atom emits a photon during the transition N 5 to N 1 its recoil speed is approximately?

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We know that momentum is given by equation

p= h/λ

Hydrogen atom emits photon during transition from n= 5 to n=1 

Substituting in equation (1) we get

This is the recoil speed of hydrogen atom. 

Answered by Expert 10th September 2018, 11:46 AM

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