Physics (AS & A Level) · Oct / Nov 2022 · Paper 12 · Question 29

Light of a single frequency is incident on a pair of narrow slits that are a distance of 0.10 mm apart. A series of bright and dark fringes is observed on a screen a distance of 2.0 m away. The distance between adjacent bright fringes is 8.0 mm. What is the path difference of the light waves from the two slits that meet at the second-order dark fringe?

1. A2.0 × 10⁻⁷ m
2. B4.0 × 10⁻⁷ m
3. C6.0 × 10⁻⁷ m
4. D8.0 × 10⁻⁷ m

As printed in the paper