A beam of light consisting of two wavelength, 650 nm and 520 nm, 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 wavelengths 650 nm.

Explanation

To find the distance of the third bright fringe on the screen from the central maximum for the wavelength of 650 nm in a Young's double-slit experiment, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Given Values:**
- Wavelength (\( \lambda \)) = 650 nm = \( 650 \times 10^{-9} \) m
- Distance from the slits to the screen (\( D \)) = 1.4 m
- Distance between the two slits (\( d \)) = 0.28 mm = \( 0.28 \times 10^{-3} \) m
...