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The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is (a) 4125 Å (b) 3000 Å (c) 6000 Å (d) 2062.5 Å



The photoelectric work function for a metal surface is 4.125 eV. The cut off wavelength for this surface is


        (a)    4125 Å


        (b)    3000 Å


        (c)    6000 Å


        (d)    2062.5 Å


Grade:11

1 Answers

Amit Saxena
35 Points
8 years ago

(b)

Let l0 be cut off wavelength

work function. =  = 4.125 × 1.6 × 10-19

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