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The threshold frequency of a metal with work function 6 . 63 eV is :

Options

  1. A16 × 10 15 Hz
  2. B16 × 10 12 Hz
  3. C1 . 6 × 10 12 Hz
  4. D1 . 6 × 10 15 Hz

Correct answer

D. 1 . 6 × 10 15 Hz

Step-by-step solution

The formula to calculate the work function of the metal is given by ϕ 0 = h v 0 . . . 1 From equation (1), it follows that 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 Hz

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