Question

In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.

Answer 1

d = 0.28 mm = 0.28 x 10^-3 m

D = 1.4 m

y₄ = 1.2 cm = 1.2 x 10^-2 m