With refrernece to the photoelectric effect,define the terms 'work function' and 'threshold wavelength' for a given metal.On what factors will the following depend during phtotelelctric emission from a metal surface:
the magnitude of phtotelectric curent, and

Define work function of metal and photoelectric effect.

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

Work function of a metl surface is 4.2 eV. The maximum wavelength which can eject electrons from this metal surface is:

Photoelectric effect When light of sufficeintly small wavelength is incident on a metal cathode, it may emit electons called photoelectrons. Above threshold frequency the stopping potenital and hence the energy of the photoelectrons are directly proportional to the frequency. in the given figure, we see the variation of stopping potential with the frequency of incident radiation for three metals A, B and C. Which metal has the largest threshold wavelenght?

Photoelectric effect When light of sufficeintly small wavelength is incident on a metal cathode, it may emit electons called photoelectrons. Above threshold frequency the stopping potenital and hence the energy of the photoelectrons are directly proportional to the frequency. in the given figure, we see the variation of stopping potential with the frequency of incident radiation for three metals A, B and C. Which of these metals A, B or C are suitable for photoelectric cell?

Photoelectric effect When light of sufficeintly small wavelength is incident on a metal cathode, it may emit electons called photoelectrons. Above threshold frequency the stopping potenital and hence the energy of the photoelectrons are directly proportional to the frequency. in the given figure, we see the variation of stopping potential with the frequency of incident radiation for three metals A, B and C. Slope of graph is given by