Physics (AS & A Level) · Oct / Nov 2020 · Paper 12 · Question 29

An experiment is carried out to demonstrate double-slit interference using light of wavelength 500 nm. The distance between bright fringes in the interference pattern is 5 mm. What are possible values for the distance between the slits and the screen, and the slit separation? | | slit–screen distance | slit separation | |---|---|---| | A | 50 cm | 0.5 mm | | B | 50 cm | 5 mm | | C | 5 m | 0.5 mm | | D | 5 m | 5 mm |

1. A50 cm, 0.5 mm
2. B50 cm, 5 mm
3. C5 m, 0.5 mm
4. D5 m, 5 mm

As printed in the paper