Dual Nature Of Light Question 432

Question: The photoelectric threshold wavelength of a certain metal is 3000 $ \overset{o}{\mathop{A}}, $ . If the radiation of 2000 $ \overset{o}{\mathop{A}}, $ is incident on the metal

Options:

A) Electrons will be emitted

B) Positrons will be emitted

C) Protons will be emitted

D) Electrons will not be emitted

Show Answer

Answer:

Correct Answer: A

Solution:

[a] For electron emission $ {\lambda_{incident}}<{\lambda_{0}} $