When a metal surface is illuminated by light wavelengths `400 nm` and `250 nm` ,
Channel: Doubtnut
Date: 02/08/2020

When a metal surface is illuminated by light wavelengths `400 nm` and `250 nm` , the maximum velocities of the photoelectrons ejected are `upsilon` and `2 v` respectively . The work function of the metal is  `( h = "Planck's constant" , c = "velocity of light in air" )`