Question

Select One Option Correct from the following :The work function of a substance is 4 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approx- imately
(A) 540 nm
(B) 400 nm
(C) 310 nm
(D) 220 nm

Answer 1

Hola mate

Here is ur ans..

Ans:- 310mm

Hope it helps