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Question

If the work function of a metal is 6.63 eV, then find its threshold frequency for photoelectric effect.

Options :

  1. 1.9 × 1015 Hz

  2. 1.6 × 1015 Hz

  3. 2 × 1016 Hz

  4. 1.2 × 1015 Hz

Show Answer

Answer :

1.6 × 1015 Hz

Solution :

ϕ 0 = h v 0

6.63 × 1.6 × 10 − 19 = 6.63 × 10 − 34

v 0 v 0 = 1.6 × 10 − 19 10 − 34

v 0 = 1.6 × 10 15 H z

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