In Davisson-Germer experiment, if the angle of diffraction is `52^(@)`, the find the glancing angle.

Explanation

To solve the problem of finding the glancing angle in the Davisson-Germer experiment, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Information**:
- The angle of diffraction (φ) is given as 52 degrees.

2. **Use the Relationship Between Angles**:
- In the Davisson-Germer experiment, the relationship between the angle of diffraction (φ) and the glancing angle (θ) is given by the equation:
\[ 2\theta + \phi = 180^\circ \]

3. **Substitute the Given Value**:
- Substitute φ = 52 degrees into the equation:
\[ 2\theta + 52^\circ = 180^\circ \]

4. **Rearrange the Equation**:
- To isolate 2θ, subtract 52 degrees from both sides:
\[ 2\theta = 180^\circ - 52^\circ \]

5. **Calculate the Right Side**:
- Perform the subtraction:
\[ 2\theta = 128^\circ \]

6. **Solve for θ**:
- Divide both sides by 2 to find θ:
\[ \theta = \frac{128^\circ}{2} = 64^\circ \]

7. **State the Final Answer**:
- The glancing angle (θ) is 64 degrees.

### Final Answer:
The glancing angle is 64 degrees.

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