A metallic surface is illuminated alternatively with light of wavelenghts `3000 Å` and `6000 Å`
Channel: Doubtnut
Date: 2020-07-12

A metallic surface is illuminated alternatively with light of wavelenghts `3000 Å` and `6000 Å`. It is observed that the maximum speeds of the photoelectrons under these illuminations are in  the ratio 3 : 1 . Calculate the work function of the metal and the maximum speed of the photoelectrons in two cases.