Question

In a biprism experiment, if the biprism is moved towards the light source a little, then the fringe width will -

• A. Increase
• B. Decrease
• C. Not change
• D. Increase or decrease depending the angle of prism

Answer 1

Answer: (A)

Increase

Answer 2

b = $\frac{\lambda D}{d}$= $\frac{\lambda D}{2a(\mu - 1)\alpha}$

\ b µ 1/a If a ¯, b­