Dual Nature Of Light Question 266
Question: Work function of a metal is 2.51 eV. Its threshold frequency is [MP PET 1996; Pb. PET 2003]
Options:
A) $ 5.9\times 10^{14} $ cycle/sec
B) $ 6.5\times 10^{14}cycle/\sec $ cycle/sec
C) $ 9.4\times 10^{14}cycle/\sec $ cycle/sec
D) $ 6.08\times 10^{14} $ cycle/sec
Show Answer
Answer:
Correct Answer: D
Solution:
$ W_{0}=h{\nu_{0}},\Rightarrow {\nu_{0}}=\frac{W_{0}}{h}=\frac{2.51\times 1.6\times {{10}^{-19}}}{6.6\times {{10}^{-34}}} $ $ =6.08\times 10^{14},Cycle/\sec . $
BETA
