In Davisson - Germer experiment , find the glancing angle if the anlge of diffraction is `50^@` .

Explanation

To solve the problem, we need to find the glancing angle (θ) in the Davisson-Germer experiment given the angle of diffraction (φ) is 50 degrees.

### Step-by-Step Solution:

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