Define photoelectric effect. Draw a graph to show the variation of stopping potential with frequency of incident radiation on a metal plate.

Explanation

### Step-by-Step Solution

**Step 1: Define the Photoelectric Effect**

The photoelectric effect is a phenomenon where electrons are emitted from a material (usually a metal) when it is exposed to light (or electromagnetic radiation) of sufficient frequency. This effect demonstrates the particle nature of light, as it suggests that light consists of particles called photons, which can transfer energy to electrons in the material.

**Definition:**
The photoelectric effect is the emission of electrons from a material when it is illuminated by light of a frequency above a certain threshold frequency.
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