What is the photoelectric effect? Define stopping potential and p… - Vidyadip

Question

What is the photoelectric effect? Define stopping potential and photoelectric work function.

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Answer

The phenomenon of emission of electrons from a metal surface, when radiation of appropriate frequency is incident on it, is known as the photoelectric effect.
If increasingly negative potentials were applied to the collector in the experiment of the photoelectric effect, the photocurrent decreases and for some typical value $(– V_0)$, photocurrent becomes zero. This value of $V_0$ is termed as cut-off or stopping potential.
The minimum amount of energy required to be provided to an electron to pull it out of the metal from the surface is called the work function of the metal.

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