A beam of light consisting of two wavelengths `6500A^(0)" and "5200A^(0)` is used to obtain interference fringes in a Young's double slit experiment.
Find the distance of the third bright fringe on the screen from the central maximum for wavelength `6500A^(0)`. The distance between the slits is 2mm and the distance between the plane of the slits and the screen is 120 cm.

Explanation

To solve the problem of finding the distance of the third bright fringe on the screen from the central maximum for the wavelength of 6500 Å, we can follow these steps:

### Step 1: Understand the problem
We are given two wavelengths of light, but we only need to focus on the wavelength of 6500 Å. We also have the distance between the slits (d) and the distance from the slits to the screen (D).

### Step 2: Convert units
1. Convert the wavelength from angstroms to meters:
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