Question

Light at 633 nm from a helium–neon laser shines on a pair of parallel slits separated by 1.57 ✕ 10−5 m and an interference pattern is observed on a screen 2.10 m from the plane of the slits.

1. find angle from central maximum to first bright fringe

2. at what angle from central maximum does the second dark fringe appear?

3. find the distance (in m) from the central maximum to the first bright fringe.

Answer 1