Let `I_1 and I_2` be intensities of two sources such that `(I_1)/(I_2) = k`. Find value of `(I_("max") - I_("min"))/(I_("max") + I_("min"))`.

Explanation

To solve the problem, we need to find the value of \((I_{\text{max}} - I_{\text{min}})/(I_{\text{max}} + I_{\text{min}})\) given the relationship between the intensities of two sources \(I_1\) and \(I_2\) such that \(\frac{I_1}{I_2} = k\).

### Step-by-Step Solution:

1. **Understanding Maximum and Minimum Intensities**:
- The maximum intensity \(I_{\text{max}}\) for two coherent sources is given by:
\[
I_{\text{max}} = (\sqrt{I_1} + \sqrt{I_2})^2
...