Dual Nature Of Light Question 452
Question: Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface
Options:
A) 4000 $ \overset{o}{\mathop{A}}, $ , 7500 $ \overset{o}{\mathop{A}}, $
B) 5500 $ \overset{o}{\mathop{A}}, $ , 6000 $ \overset{o}{\mathop{A}}, $
C) 4000 $ \overset{o}{\mathop{A}}, $ , 6000 $ \overset{o}{\mathop{A}}, $
D) None of these
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Threshold wavelength $ {\lambda_{0}}=\frac{12375}{2.1}=5892.8,\overset{o}{\mathop{A}}, $
BETA
