A light beam of power 1.5 mW and 400 nm wavelength incident on a cathode. If quantum efficiency is 0.1 % then, find out obtained photo current and number of photoelectron per second.

A light of intensity 16 mW and energy of each photon 10 eV incident on a metal plate of work function 5 eV and area 10^(-4)m^(2) then find the maximum kinetic energy of emitted electrons and the number of photoelectrons emitted per second if photon efficiency is 10% .

A light of intensity 16 mW and energy of each photon 10 eV incident on a metal plate of work function 5 eV and area 10^(-4)m^(2) then find the maximum kinetic energy of emitted electrons and the number of photoelectrons emitted per second if photon efficiency is 10% .

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60^@ and the number of photons striking the mirror per second is (1.0 xx (10^19)) . Calculate the force exerted by the light beam on the mirror.

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60^@ and the number of photons striking the mirror per second is 1.0 xx 10^19 . Calculate the force exerted by the light beam on the mirror.

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflection plane mirror. The angle of incidence is 60^@ and the number of photons striking the mirror per second is 1.0xx10^19 . Calculate the force exerted by the light beam on the mirror.

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflecting plane mirror. The angle of incidence is 60^@ and the number of photons striking the mirror per second is 1.0 xx 10^19 . Calculate the force exerted by the light beam on the mirror.

A parallel beam of monochromatic light of wavelength 663 nm is incident on a totally reflection plane mirror. The angle of incidence is 60^@ and the number of photons striking the mirror per second is 1.0xx10^19 . Calculate the force exerted by the light beam on the mirror.

A monochromatic light of wavelength lambda is incident on an isolated metalic sphere of radius a . The threshold wavelength is lambda_(0) which is larger then lambda . Find the number of photoelectrons emitted before the emission of photo electrons stops.

1.5 mW of 400 nm light is directed at a photoelectric cell. If 0.1% of the incident photons produce photoelectrons, find the current in the cell.