Q. If an electron and a photon have the same wavelength, then they will have the same__:
Answer: linear momentum
Notes: When a non-relativistic electron and a non-relativistic proton move having the same de Broglie wavelength, then they will have the same linear momentum p = mv. If the electron and proton have the same momentum, they cannot have the same speed because of the difference in their masses. An electron and photon can have the same wavelength since the wavelength of electron can be changed by changing its velocity.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 55 in Physics GK 23 - Atomic and Nuclear Physics Basics in above course in App.