Dual Nature Of Light Question 442
Question: The wavelength associated with an electron accelerated through a potential difference of 100 V is nearly
Options:
A) 100 $ \overset{o}{\mathop{A}}, $
B) 123 $ \overset{o}{\mathop{A}}, $
C) 1.23 $ \overset{o}{\mathop{A}}, $
D) 0.123 $ \overset{o}{\mathop{A}}, $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ \lambda =\frac{h}{\sqrt{2mQV}}=\frac{6.6\times {{10}^{-34}}}{\sqrt{2\times 9.1\times {{10}^{-31}}\times 1.6\times {{10}^{-19}}\times 100}} $ $ =1.23,\overset{o}{\mathop{A}}, $
BETA
