Dual Nature Of Light Question 390
Question: If an electron is accelerated through a potential difference 150 volt, its de-Broglie wavelength is:
Options:
A) $ 1\overset{o}{\mathop{A}}, $
B) $ 100\overset{o}{\mathop{A}}, $
C) $ 5000\overset{o}{\mathop{A}}, $
D) $ 90000\overset{o}{\mathop{A}}, $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ \lambda =\frac{h}{\sqrt{2meV}}={{( \frac{150}{V} )}^{\frac{1}{2}}}{{A}^{o}}={{( \frac{150}{150} )}^{\frac{1}{2}}}{{A}^{o}}=1{{A}^{o}} $
BETA
