Atomic Structure Question 374
Question: The number of photons of light having wave number ‘x’ in 10 J of energy source is:
Options:
A) $ 10hcx $
B) $ \frac{hc}{10x} $
C) $ \frac{10}{hcx} $
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
- $ E=\frac{nhc}{\lambda }=nhc\overline{v}( \because ,\overline{v}=\frac{1}{\lambda } ) $
$ \therefore 10=nhc\overline{v}, $ or $ n=\frac{10}{hc\overline{v}}=\frac{10}{hcx} $
