11 1 to study the variation of photocurrent with (a)
intensity of radiation, (b) frequency of incident radiation,
(c) the potential difference between the plates A and C,
and (d) the nature of the material of plate C Light of
different frequencies can be used by putting appropriate
coloured filter or coloured glass in the path of light falling
FIGURE 11 1 Experimental
arrangement for  study of
photoelectric effect