Question

In Young’s double slit experiment, width of the two slits are in the ratio 25 : 1. Calculate the ratio of amplitudes.

Answer 1

In Young’s double slit experiment amplitude is directly proportional to the width of the slit.

I ∝ A²

`I_1/I_2 = A_1^2/A_2^2`

`25/1 = A_1^2/A_2^2`

`5/1 = A_1/A_2`

∴ The amplitudes will be in the ratio 5 : 1.