When a metal irradiated with energy of 10.2ev ,electron ejected with 7.4ev of kinetic energy Then threshold energy of metal

The work function of a metal is 4.0 eV . If the metal is irradiated with radiation of wavelength 200 nm, then the maximum kinetic energy of the photoelectrons would be about.

A metal is irradiated with light of frequency 3.2xx10^(16)Hz . The ejected photoelectron has kinetic energy (3)/(4) the of energy of absorbed photon. The threshold frequency orf the metal would be :

The work function for caesium atom is 1.9 eV . Calculate (a) the threshold wavelength and (b) the threshold frequency of the radiation. If the caesium element is irradiated with a wavelength 500 nm , calculate the kinetic energy and the velocity of the ejected photoelectron.

A metal of work function 2.5 eV is irradiated by light. If the emitted electrons have maximum kinetic energy 1.8 eV, then the energy of irradiating light is

When a metal is illuminated with light of frequency f, the maximum kinetic energy of the photoelectrons is 1.2 eV. When the frequency is increased by 50% the maximum kinetic energy increases to 4.2 eV. What is the threshold frequency for this metal?

A photon of wavelenth 3000 A strikes a metal surface, the work function of the metal being 2.20eV . Calculate (i) the energy of the photon in eV(ii) the kinetic energy of the emitted photo electron and (iii) the velocity of the photo electron.

If a certain metal was irradiated by using two different light radiations of frequency 'x' and '2x' the maximum kinetic energy of the ejected electrons are 'y' and '3y' respectively the threshold frequency of the metal is

A photon of wavelength 4 xx 10^(-7) m strikes on metal surface , the work function fo the metal being 2. 13 eV Calculate : (i) the energy of the photon (ev) (ii) the kinetic energy fo the emission and the velocity fo the photoelectron ( 1 eV = 1 , 6020 xx 10^(-19) J) ,