If `lamda_(0)` and `lamda` be the threshold wavelength and the wavelength of incident light, the speed of photo-electrons ejected from the metal surface is:

If lamda_o and lamda be the threshold wavelength and wavelength of incident light , the velocity of photoelectron ejected from the metal surface is :

If lamda_o and lamda be the threshold wavelength and wavelength of incident light , the velocity of photoelectron ejected from the metal surface is :

If lamda_o and lamda be the threshold wavelength and wavelength of incident light , the velocity of photoelectron ejected from the metal surface is :

If lambda_(0) is the threshold wavelnegth of a metal and lambda is the wavelength of the incident radiation, the maximum velocity of the ejected electron from the metal would be

A monochromatic light of wavelength lamda is incident on an isolated metallic sphere of radius a. The threshold wavelength is lamda_(0) , which is larger than lamda . Find the number of photoelectrons emitted before the emission of photo electrons stops.

If I_(0) is the threshold wavelength for photoelectric emission, 1 the wavelength of light falling on the surface of a metal and m is the mass of the electron, then the velocity of ejected electron is given by

A If the wavelength of the incident radiation changes from lamda_(1) to lamda_(2) then the maximum kinetic energy of the emitted photo electrons changes from K to K,, then the work function of the emitter surface is

A If the wavelength of the incident radiation changes from lamda_(1) to lamda_(2) then the maximum kinetic energy of the emitted photo electrons changes from K to K,, then the work function of the emitter surface is