Q. 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) 200P
B) 400P
C) P/200
D) 100P
Explanation
[Solution from source] λ = h/p gives |Δλ/λ| = Δp/p for small changes. So 0.005 = P/p₀ and p₀ = P/0.005 = 200P. P/200 inverts the relation. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.