| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.HL.TZ0.28 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 28 | Adapted from | N/A |
Question
Monochromatic light is incident on two identical slits to produce an interference pattern on a screen. One slit is then covered so that no light emerges from it. What is the change to the pattern observed on the screen?
A. Fewer maxima will be observed.
B. The intensity of the central maximum will increase.
C. The outer maxima will become narrower.
D. The width of the central maximum will decrease.
Markscheme
A
Examiners report
[N/A]
Syllabus sections
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