Question

The fringe width for red colour as compared to that for violet colour is approximately

• A. 4 times
• B. 8 times
• C. 3 times
• D. Double

Answer 1

Answer: (D)

$\beta =\frac{\lambda D}{d},\frac{{\beta }_1}{{\beta }_2}=\frac{{\lambda }_1}{{\lambda }_2}$