A beam of light has three wavelengths 4144 4972 6216 with a

Last updated: 6/2/2023

A beam of light has three wavelengths 4144 4972 6216 with a total intensity 3 6x10 W m equally distributed amongst the three wavelengths The beam falls normally on a area 1 0 cm of a clean metallic surface of work function 2 3 eV Assume that there is no loss of ligh by reflection and that each energetically capable photon ejects one electron Calculate the number c photoelectrons liberated in two seconds In a photo electric effect set up a point source of light of power 3 2 x 10 W emits mono energeti Foneca 5 0 cV The source is located at a distance of 0 8 m from the centre of a stationary