Dual Nature Of Light Question 153
Question: The wavelength of de-Broglie wave is 2mm, then its momentum is (h = 6.63 ´ 10?34 J-s) [DCE 2004]
Options:
A) 3.315 ´ 10?28 kg-m/s
B) 1.66 ´ 10?28 kg-m/s
C) 4.97 ´ 10?28 kg-m/s
D) 9.9 ´ 10?28 kg-m/s
Show Answer
Answer:
Correct Answer: A
Solution:
$ \lambda =\frac{h}{p}\Rightarrow p=\frac{h}{\lambda }=\frac{6.63\times {{10}^{-34}}}{2\times {{10}^{-6}}} $ $ =3.31\times {{10}^{-28}}kg\text{-},m/\sec $
BETA
