Physics (AS & A Level) · Oct / Nov 2023 · Paper 13 · Question 28

Light of a single wavelength is incident normally on a double slit. The slit separation can be varied. A screen is placed a fixed distance away from the double slit. The screen and double slit are parallel. A pattern of bright interference fringes is observed on a screen. Which graph best shows the variation of the separation x of the bright interference fringes with the slit separation a?

1. AGraph A
2. BGraph B
3. CGraph C
4. DGraph D

As printed in the paper