Question

The interference pattern is obtained with two coherent light sources of intensity ratio \( 9 : 1 \). The ratio of \( \frac{I_{MAX}+I_{MIN}}{I_{MAX}-I_{MIN}} \) is \( \frac{\alpha}{\beta} \). The values of \( \alpha \) and \( \beta \) are:

• A. 5 and 3
• B. 3 and 1
• C. 1 and 9
• D. 9 and 1

Hint:

In interference, use \( I_{max}=(\sqrt{I_1}+\sqrt{I_2})^2 \) and \( I_{min}=(\sqrt{I_1}-\sqrt{I_2})^2 \) directly to save time.

Answer 1

The Correct Option is A