Dual Nature Of Light Question 225
Question: Wavelength of a 1 keV photon is $ 1.24\times {{10}^{-9}}m $ . What is the frequency of 1 MeV photon [CBSE PMT 1993; MP PET 2005]
Options:
A) $ 1.24\times 10^{15}Hz $
B) $ 2.4\times 10^{20}Hz $
C) $ 1.24\times 10^{18}Hz $
D) $ 2.4\times 10^{23}Hz $
Show Answer
Answer:
Correct Answer: B
Solution:
$ E=h\nu ,\Rightarrow ,\nu =\frac{E}{h}=\frac{1\times 10^{6}\times 1.6\times {{10}^{-19}}}{6.6\times {{10}^{-34}}} $ $ =2.4\times 10^{20},Hz $
BETA
