AIPMT MAINS2012Physics-Modern Physics
AIPMT MAINS 2012 Physics De Broglie Wavelength MCQ Question
Type: MCQ-conceptual-Medium-Class 12
If the momentum of electron is changed by P, then the de Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:
A
200 P
B
400 P
C
P/200
D
100 P
Correct Answer
Option A
Detailed Explanation
The de Broglie wavelength λ is given by λ = h/P. A change in momentum by P results in a change in wavelength by 0.5%. Solving the equation 0.5/100 = P/P' gives P' = 200P.
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