Explain the term stopping potential and threshold frequency.

(a) State three important properties of photons which describe the particle picture of electromagnetic radiation. (b) Use Einstein's photoelectric equation to define the terms (i) stopping potential and (ii) threshold frequency.

Write Einstein's photoelectrical equation in terms of the stopping potential and the threshold frequency for a given photosensitive material. Draw a plot showing the variation of stopping potential vs the frequency of incident radiation.

Define stopping potential and threshold frequency in relation to photoelectric effect.

Define the terms-work function and threshold frequency.

Define the terms : Stopping potential.

When a certain photosensistive surface is illuminated with monochromatic light of frequency v, the stopping potential for the photo current is V_(0)//2 . When the surface is illuminated by monochromatic light of frequency v//2 , the stopping potential is V_(0) . The threshold frequency gor photoelectric emission is :