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QAIPM-2015-Ph-1236: NEET 2015 Physics - Class 12 AIPM-2015-Ph-1236 Solution: A photoelectric surface is illuminated successively by…

A photoelectric surface is illuminated successively by monochromatic light of wavelength

\lambda

and

\lambda/2

. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case the work function of the surface of the material is (h = Planck's constant c = speed of light)

\frac{hc}{2\lambda}

\frac{2hc}{\lambda}

\frac{hc}{3\lambda}

\frac{hc}{\lambda}

Multiple Choice Options

A ${{2hc} \over \lambda }$ _ 2 h c _
B ${{hc} \over {3\lambda }}$ 3 _ h c _
C ${{hc} \over {2\lambda }}$ 2 _ h c _
D ${{hc} \over \lambda }$ _ h c _

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