The magnetic field associated with a light wave is given, at the origin, by B = B₀ [sin(3.14 × 10⁷)ct + sin(6.28 × 10⁷)ct]. If this light falls on a silver plate having a work function of 4.7 eV, what will be the maximum kinetic energy of the photo electrons? (c = 3 × 10⁸ ms^–1, h = 6.6 × 10^–34 J-s)