Dual Nature Of Light Question 282
Question: Threshold wavelength for photoelectric effect on sodium is 5000 Å. Its work function is [CBSE PMT 1993]
Options:
A) 15 J
B) $ 16\times {{10}^{-14}}J $
C) $ 4\times {{10}^{-19}}J $
D) $ 4\times {{10}^{-81}}J $
Show Answer
Answer:
Correct Answer: C
Solution:
$ W_{0}=\frac{hc}{{\lambda_{0}}}=\frac{6.625\times {{10}^{-34}}\times 3\times 10^{8}}{5000\times {{10}^{-10}}}J=4\times {{10}^{-19}}J $
BETA
