Physics - Modern Physics Question with Solution | TestHub

Polychromatic light described at a place by the equation

$$\mathrm{E}=100\left[\sin \left(0.5\pi \times 10^{15}t\right)+\cos \left(\pi \times 10^{15}t\right)+\sin \left(2\pi \times 10^{15}t\right)\right]$$

where E is in V/m and t in sec, falls on a metal surface having work function 2.0 eV. The maximum kinetic energy of the photoelectron is

[Take h = Planck's constant = $6.4\times 10^{-34}\mathrm{J}-\mathrm{s}$ ]