Physics

Problem

A photoelectric surface is illuminated successively by monochromatic light of wavelengths

\lambda

and

\frac{\lambda}{2}

. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, what is the work function of the surface? a.

\frac{hc}{2\lambda}

\frac{hc}{\lambda}

\frac{hc}{3\lambda}

\frac{3hc}{\lambda}

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