Light rays of wavelength `6000A^(@)` and of photon intensity `39.6 watts//m^(2)` is
Channel: Doubtnut
Date: 2020-02-09

Light rays of wavelength `6000A^(@)` and of photon intensity `39.6 watts//m^(2)` is incident on a metal surface. If only one percent of photons incident on the surface of electons emitted per second unit area from the surface will be [Planck constant =`6.64xx10^(-34) J-S`,Velocity of light =`3xx10^(8) ms^(-1)`]