Physics (AS & A Level) · Feb / March 2017 · Paper 12 · Question 29

In an experiment to demonstrate two-source interference of light, a beam of light is split into two beams using two slits 0.50 mm apart. These two beams are incident on a laboratory wall at a distance of 4.0 m. The wavelength of light is 550 nm. How far apart are two adjacent interference fringes that are formed on the laboratory wall?

1. A0.22 mm
2. B0.44 mm
3. C2.2 mm
4. D4.4 mm

As printed in the paper