If the threshold frequency for tungsten is 1.3 x 1015Hz, what is its work function?…

If the threshold frequency for tungsten is 1.3 x 1015Hz, what is its work function?
[H = 6.6 x 10-34 Js]
  • A.
    8.58 x 10-19 J
  • B.
    8.50 x 10-15 J
  • C.
    8.58 x 10-17 J
  • D.
    8.85 x 10-18
Correct Answer: Option A
Explanation

Work function, w = hfo 6.6 x 10-34 x 1.3 x 1015
= 8.58 x 10-19

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