Two coherent monochromatic light beams of intensities I and 9I are superposed. What will be the maximum and minimum possible intensities?

Explanation

To solve the problem of finding the maximum and minimum possible intensities when two coherent monochromatic light beams of intensities \( I \) and \( 9I \) are superposed, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Intensities**:
Let the intensity of the first beam be \( I_1 = I \) and the intensity of the second beam be \( I_2 = 9I \).

2. **Calculate Maximum Intensity**:
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