Question

Two coherent monochromatic light beams of intensity \( I \) and \( 4I \) are superimposed. The maximum and minimum possible intensities in the resulting beam are:

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

Hint:

The maximum intensity occurs when the waves are in phase, and the minimum intensity occurs when the waves are out of phase, following the principle of superposition.

Answer 1

The Correct Option is C

When two coherent light waves interfere, the maximum intensity occurs when the waves are in phase, and the minimum intensity occurs when they are out of phase. The maximum intensity is the sum of the individual intensities, and the minimum intensity is the absolute difference between them. - Maximum intensity: \( 4I + I = 5I \) - Minimum intensity: \( 4I - I = 3I \)