The electric field at a point associated with a light wave
Question:

The electric field at a point associated with a light wave isE $=\left(100 \mathrm{Vm}^{-1}\right) \sin \left[\left(3.0 \times 10^{15} \mathrm{~s}^{-1}\right) \mathrm{t}\right] \sin \left[\left(6.0 \times 10^{15} \mathrm{~s}^{-1}\right) \mathrm{t}\right]$. If this light falls on a metal surface with a work function of $2.0 \mathrm{eV}$, what will be the maximum kinetic energy of the photoelectrons?

Solution: