| Date | May 2017 | Marks available | 1 | Reference code | 17M.1.HL.TZ2.27 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 27 | Adapted from | N/A |
Question
Blue light is incident on two narrow slits. Constructive interference takes place along the lines labelled 1 to 5.
The blue light is now replaced by red light. What additional change is needed so that the lines of constructive interference remain in the same angular positions?
A. Make the slits wider
B. Make the slits narrower
C. Move the slits closer together
D. Move the slits further apart
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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