Write Einstein's photoelectric equation.
Write the three salient features observed in photoelectric effect which can be explained using this equation.

Explanation

Einstein.s photoelectric equation is
`(1)/(2)mv_("max")^(2)=h(v-v_(0))`
where hv = energy of incident photon.
`hv_(0)`= work function
Also `(1)/(2)mv_(max)^(2)`=maximum K.E. of the emitted electron