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 than in the first case , the work function of the surface of the material is (`h` = Plank's constant , `c` = speed of light )
A
`(hc)/(3 lambda)`
B
`(hc)/(2 lambda) `
C
`(hc)/(lambda) `
D
`(2 hc )/(lambda)`
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The correct Answer is:
B
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