The threshold frequency and the threshold wavelength of photoelectric emission from a metal surface are `f_(0) and lamda_(0)`. The frequency and the wavelength of incident light are f and `lamda`. Then

Define threshold frequency for photoelectric emission.

What is threshold frequency in photoelectric emission?

Define threshold frequency, threshold wavelength and photosensitive material.

Calculate the threshold frequency of photon for photoelectric emission from a metal of work function 0.1eV.

Calculate the threshold frequency of photon for photoelectric emission from a metal of work function 0.1 eV.

The threshold frequency of photoelectric effect of a metal surface is f_(0) . The stopping potentials are V_(0) and nV_(0) when the frequencies of incident light are 2f_(0) and 4f_(0) . What is the value of n ?