A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ/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)

Options

(a) 2hc/λ
(b) hc/3λ
(c) hc/2λ
(d) hc/λ

Correct Answer:

hc/2λ

Explanation:

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