Radiation of a given wavelength causes electrons to be emitted from the surface of one metal but not from the surface of another metal. Explain why this could be

The photo electrons emitted from the surface of sodium metal are

The photoelectrons emitted from a metal surface:

The photo-electrons emitted from a surface of sodium metal are such that

Photoelectrons emitted from a metallic surface are

Radiation of a certain wavelength causes electrons with a maximum kinetic energy of 0.65 eV to be ejected from a metal surface whose work function is 2.65 eV. What will be the maximum kinetic energy (in eV) with which this same radiation ejects electrons from another metal whose work function is 2.15eV.

The electrons are emitted in the photoelectricm effect from a metal surface

The photoelectron emitted from a metal surface are such that their velocity

Photoelectrons emitted from a metallic surface are those which are

Kinetic energy with which the electrons are emitted from the metal surface due to photoelectric effect is