Draw a schematic diagram of the experiment used by. Davisson and Germer to establish the wave nature of electrons. Explain briefly how the de-Broglie wave relation experimentally verfied in case of electrons.

Explanation

### Step-by-Step Solution

**Step 1: Schematic Diagram of the Davisson-Germer Experiment**
1. **Electron Gun**: Draw an electron gun that emits electrons. This consists of a tungsten filament that is heated to release electrons when a high voltage (around 54 eV) is applied.
2. **Nickel Target**: Place a nickel plate opposite the electron gun. This plate will serve as the target for the electrons.
3. **Detector**: Position a detector at a certain angle (θ) from the normal to the nickel plate to measure the intensity of the reflected electrons.
4. **Incident and Reflected Beams**: Indicate the incident beam (IB) of electrons striking the nickel plate and the reflected beam (RB) coming off the plate at an angle θ.

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