Q145 / 200 · NEET 2011 (Screening) · Physics

Photoelectric emission occurs only when the incident light has more than a certain minimum

  • A
    wavelength
  • B
    intensity
  • Correct answer
    C
    frequency
  • D
    power

Solution

By the concept of threshold minimum frequency needed for photoelectric emission. $$ \begin{aligned} \frac{1}{2} m v^2 & =h\left(v-v_0\right) \\ v & \geq v_0 \end{aligned} $$

Hence, the correct answer is option: 'C'.

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