A metallic surface is irradiated with monochromatic light of variable wavelength.
Channel: Doubtnut
Date: 12/07/2020

A metallic surface is irradiated with monochromatic light of variable wavelength. Above a wavelength of `5000 Å` no photoelectrons are emitted from the surface. With an unknown  wavelength, stopping potential fo 3V  is neceddsry ot eliminate the photocurrent. Find the unknown wavelenght.