May/June 2026 Paper 11

2026 · 40 questions · 40 parts · 40 marks

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30Superposition InterferenceMedium1 mark
Green light of wavelength 550 nm passes through a double slit. This produces an interference pattern with a fringe spacing of 5.0 cm on a screen.
Which changes to the experimental arrangement result in a fringe spacing of 2.5 cm?
slit separationdistance between slits and screen
Adoubledunchanged
Bunchangeddoubled
Chalveddoubled
Ddoubledhalved