Question 22N.2.HL.TZ0.a.i
| Date | November 2022 | Marks available | [Maximum mark: 2] | Reference code | 22N.2.HL.TZ0.a.i |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Sketch | Question number | a.i | Adapted from | N/A |
A beam of coherent monochromatic light is incident normally on a single rectangular slit. The diffraction pattern is observed on a screen.
O is the point on the screen directly opposite the slit. P and Q are the first minima on either side of the central fringe of the diffraction pattern.
The intensity of light at point O is . The distance OP is .
Sketch, on the axes, a graph to show the variation of the intensity of light with distance from point O on the screen. Your graph should cover the distance range from 0 to 2.
[2]
smooth curve decreasing from to 0 between 0 and ✓
secondary maximum correctly placed AND of intensity less than 0.3 ✓
E.g. 
Most scored MP1. Many candidates scored full marks but it was common to see a maximum at 2x or a secondary maxima too high.