Question
Question: When an electron makes transition from one energy level to the other in an atom then which of the fo...
When an electron makes transition from one energy level to the other in an atom then which of the following quantities is conserved?
A
Angular momentum
B
Linear momentum
C
Mechanical energy
D
None of the above
Answer
None of the above
Explanation
Solution
Change in angular momentum
∆L = (nf – ni)h/2π
Since velocity of electron is
v ∝ 
Hence linear momentum changes
Difference in energy between energy levels is released as electromagnetic energy.