Physics (AS & A Level) · May / June 2020 · Paper 13 · Question 29
9702Interference
A double-slit interference experiment is set up using green light. A pattern of interference fringes is formed on a screen. Which single change will increase the separation of the fringes?
- Aincrease the width of each slit
- Bmove the screen nearer to the double slit
- Cuse slits that are further apart
- Duse red light instead of green light
As printed in the paper
Show the answer
Correct answer: D. use red light instead of green light
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