Question

The correct relation between the angle of diffraction $\phi$ and the glancing angle $\theta $ in Davisson - Germer experiment will be

• A. $\theta =90^{o}-\frac{\phi}{2}$
• B. $\phi=\frac{\theta }{2}-90^{o}$
• C. $\theta =90^{o}-\phi$
• D. $\phi=90^{o}-\theta $

Answer 1

Answer: (A)

From the diagram, $\theta =90^{o}-\frac{\phi}{2}$