A parallel beam of ligth of intensity `I` and cross section area `S` is incident on a plate at normal incidence. The photoelectric emission efficiency is `100%`, the frequency of beam is `v` and the work function of the plate is `phi(hv gt phi)`. Assuming all the electrons are ejected normal to the plane and with same maximum possible speed. The net force exerted on the plate only due to striking of photons and subsequent emission of electrons is

In a photoelectric experiment a parallel beam of monochromatic light with power of 200 is incident on a perfectly absorbing cathode of work function 6.25. The frequency of light is just above the threshold frequency so that the photoelectrons are emitted with negligible kinetic energy. Assume that the photoelectron emission efficiency is 100%. A potential difference of 500 is applied between the cathode and the anode. All the emitted electrons are incident normally on the anode and are absorbed. The anode experiences a force 10 due to the impact of the electrons. The value of is __________. Mass of the electron 910 and 1.01.610.

In a photoelectric experiment a parallel beam of monochromatic light with power of 200W is incident on a perfectly absorbing cathode of work function 6.25. The frequency of light is just above the threshold frequency so that the photoelectrons are emitted with negligible kinetic energy. Assume that the photoelectron emission efficiency is 100%. A potential difference of 500V is applied between the cathode and the anode. All the emitted electrons are incident normally on the anode and are absorbed. The anode experiences a force n xx 10^(-4) N due to the impact of the electrons. The value of n is __________. Mass of the electron 9.1 xx 10^(-31) Kg and charge is 1.6 xx 10^(-19) C

Light of intensity I and frequency v is incident on a photossensitive surface and causes photoelectric emission. Justify with the help of graph, the effect on photoelectric current when the frequency of incident radiation is increased all other factors remain the same.

If the work function of a metal is 'phi' and the frequency of the incident light is 'v' , there is no emission of photoelectron if

If the work function of a metal is 'phi' and the frequency of the incident light is 'v' , there is no emission of photoelectron if

If the work function of a metal is 'phi' and the frequency of the incident light is 'v' , there is no emission of photoelectron if

For photoelectric emission from certain metal the cut - off frequency is v . If radiation of frequency 2 v incident on the metal plate , the maximum possible velocity of the emitted electron will be ( m is the electron mass).