A light wave described by E=60[ sin (3 × 10^15) t+ sin (12 × 10^15) t] (in SI units) falls on a metal surface of work function 2.8 eV. The maximum…

A light wave described by $\displaystyle E=60\left[\sin \left(3 \times 10^{15}\right) t+\sin \left(12 \times 10^{15}\right) t\right]$ (in SI units) falls on a metal surface of work function $\displaystyle 2.8$ eV . The maximum kinetic energy of ejected photoelectron is (approximately) $\displaystyle \_\_\_\_$ eV. $\displaystyle \left(\mathrm{h}=6.6 \times 10^{-34} \mathrm{~J} . \mathrm{s}\right.$. and $\displaystyle \left.\mathrm{e}=1.6 \times 10^{-19} \mathrm{C}\right)$