The work function of a substance is 4.0 eV. The longest wavelength of light that can cause
Channel: Doubtnut
Date: 05/07/2020

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately. (a) 540 nm (b ) 400nm (c ) 310 nm (d) 220 nm