Exam-style question
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If the distance between the slits in Young's double-slit experiment is doubled, how does this affect the fringe spacing?.
- A.Fringe spacing doubles
- B.Fringe spacing halves
- C.Fringe spacing remains the same
- D.Fringe spacing quadruples
Model answer
What a good answer should say
- Fringe spacing halves
Explanation
Why this works
Doubling the distance between the slits reduces the fringe spacing by half, as fringe spacing is inversely proportional to the distance between the slits in the double-slit experiment.
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