Laser light of wavelength 640 nm incident on a pair of slits produces an interference patterns in which the bright fringes are separated by 8.1 mm. A second light produces an interference pattern in which the fringes and separated by 7.2 mm. Calculate the wavelength of the second light.

Explanation

To solve the problem, we will use the relationship between fringe width (β), wavelength (λ), and the distance between the slits (D) and the screen (L). The formula we will use is:

\[ \beta = \frac{\lambda D}{d} \]

Where:
- β is the fringe width,
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