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

Photoelectric emission occurs only when the incident light has more than a certain minimum
  1. wavelength
  2. intensity
  3. frequency
  4. power

Solution

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

Asked in: NEET 2011 (Screening)

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