In Young's double-slit experiment, a screen is placed 1.5 m away from slits which are 0.03 cm apart. The distance between the central bright fringe and fourth bright fringe is 1 cm. Calculate the wavelength of light used.

Explanation

To solve the problem, we will use the formula for the position of bright fringes in Young's double-slit experiment. The formula for the position of the nth bright fringe (Y_n) is given by:

\[ Y_n = \frac{n \lambda D}{d} \]

where:
- \( Y_n \) = distance from the central maximum to the nth bright fringe
- \( n \) = order of the bright fringe (for the fourth bright fringe, \( n = 4 \))
- \( \lambda \) = wavelength of light
...