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

Physics
JAMB 2011
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
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Correct Answer: Option A
Explanation
Work function, w = hfo 6.6 x 10-34 x 1.3 x 1015
= 8.58 x 10-19

There is an explanation video available below.

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Explanation Video

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