Is photoelectric emission possible at all frequencies?

Derive the relation for Einstein.s photoelectric equation in terms of frequency.

Exaplain the laws of photoelectric emission on the basis of Einstein.s photoelectric equation.

What is photoelectric effect? Which metal can cause photoelectric emission with visible light?

Why is it important for photoelectric emission that the metal surface shoulb be clean?

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelenght 330 nm?

The work function of a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelength 330 nm?