Dual Nature Of Light Question 149
Question: An electron and proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is [Kerala PMT 2004]
Options:
A) Zero
B) Infinity
C) Equal to the kinetic energy of the proton
D) Greater than the kinetic energy of the proton
Show Answer
Answer:
Correct Answer: D
Solution:
$ \lambda =\frac{h}{\sqrt{2mE}}\Rightarrow E\propto \frac{1}{\sqrt{m}} $ $ (\lambda = $ constant) $ \because ,m_{e}<m_{p} $ so $ E_{e}>E_{p} $
BETA
