DP Physics (last assessment 2024)
Question 18M.2.SL.TZ1.3b.ii
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.SL.TZ1.3b.ii |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
18M.2.SL.TZ1.3b.ii
A beam of coherent monochromatic light from a distant galaxy is used in an optics experiment on Earth.
The air between the slits and the screen is replaced with water. The refractive index of water is 1.33.
(b.ii)
State two ways in which the intensity pattern on the screen changes.
[2]
Markscheme
distance between peaks decreases
intensity decreases
[2 marks]
