Class 12 NEET Physics Dual Nature of Matter and Radiation

Let K and K′ be the maximum kinetic energy of photoelectrons for incident light of frequency υ and 2υ respectively.
According to Einstein's photoelectric equation,
K=hυ−E0 .......(i)
and K′=h(2υ)−E0 .....(ii)
=2hυ−E0=hυ+hυ−E0
K′=hυ+K [using (i)]