IB Physics SL C.3.7 Path Difference Question Bank
Practise IB Physics SL C.3.7 by calculating path differences and deciding when waves produce bright maxima or dark minima.
- Syllabus
- First assessment 2025
- Course
- Physics SL
- Level
- SL
C.3.7—Path difference question 1
This question is about interference.
Light from a laser is incident on two identical parallel slits. The light from the two slits produces a fringe pattern on a screen.
A central bright fringe is produced at C . The next bright fringe is produced at A . There is a dark fringe at B .
The distance from the two slits to the screen is 1.5 m . The distance BC is 1.8 mm and the distance between the slits is 0.30 mm .
State the path difference, in metres, between the waves that meet at B .
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