For a certain metal,the threshold frequency is 1.3 x `10^20 s^-1`. When it was irradiated with ultra violet light having wavelength 1.6pm photoelectrons were produced. The maximum kinetic energy of the phtoelectron would be

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.

The threshold wavelength of tungsten is 2300 Å. If ultra voilet light of wavelength 1800 Å is incident on it, then the maximum kinetic energy of photoelectrons would be

If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength lambda then for 1.5 p momentum of the photoelectron, the wavelength of the light should be: (Assume kinetic energy of ejected photoelectron to be very high in comparison to work function):

Light of frequency 4 v_(0) is incident on the metal of the threshold frequency v_(0) . The maximum kinetic energy of the emitted photoelectrons is

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 having work function 4.41xx10^(-19) J is sunjected to a light having wavelength 300nm, then maximum kinetic energy of the emitted photoelectron is ...........xx10^(-21)J