Exam-style question
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In a double-slit experiment, if the distance between the slits is halved, what happens to the fringe spacing on the screen?.
- 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 doubles
Explanation
Why this works
The fringe spacing is inversely proportional to the slit separation. If the distance between the slits is halved, the fringe spacing on the screen will double, as defined by the formula for fringe spacing in a double-slit experiment.
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