Q. Electrons used in an electron microscope are accelerated by a voltage of $25\ kV.$ If the voltage is increased to $100\ kV$ then the de-Broglie wavelength associated with the electrons would
A) Increase by 4 times
B) Increase by 2 times
C) Decrease by 2 times
D) Decrease by 4 times
Explanation
(c) $\lambda \propto \frac{1}{\sqrt{volt}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.