Dual Nature Of Light Question 278
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 [Bihar MEE 1995]
Options:
A) 4000 Å, 7500 Å
B) 5500 Å, 6000 Å
C) 4000 Å, 6000 Å
D) None of these
Show Answer
Answer:
Correct Answer: D
Solution:
Threshold wavelength $ {\lambda_{0}}=\frac{12375}{2.1}=5892.8,{\AA} $
BETA
