Light of wavelength 4000 Å is incident on a sodium surface for which the threshold wavelength of photoelectrons is 5420 Å. The work function of sodium is

If the threshold wavelength for sodium is 5420 Å , then the work function of sodium is

The threshold wavelength for tungsten is 2730 Å . The work function of tungsten is

The threshold wavelength for a certain metal is 2000 Å. The work function of the is

Threshold wavelength for photoelectric effect on sodium is 5000 Å . Its work function is

Threshold wavelength for photoelectric effect on sodium is 5000 Å . Its work function is

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

If threshold wavelength for sodium is 6800Å then the work function will be

Light of waelength 4000Å is incident on a metal plate with work function 2eV. The max. K.E. of the photoelectrons is