Dual Nature Of Light Question 509
Question: The energy of an X- ray photon of wavelength 1.65 Å is $ (h=6.6\times {{10}^{-34}}J\text{-}sec,c=3\times 10^{8}m{{s}^{-1}} $ , $ 1eV=1.6\times {{10}^{-19}}J) $ [EAMCET (Engg.) 2000]
Options:
A) 3.5 keV
B) 5.5 keV
C) 7.5 keV
D) 9.5 keV
Show Answer
Answer:
Correct Answer: C
Solution:
$ E(eV)=\frac{12375}{1.65}=7500eV=7.5keV. $
BETA
