Physics (AS & A Level) · Oct / Nov 2016 · Paper 12 · Question 28
9702Interference
Monochromatic light of wavelength 450 nm passes through two parallel slits 0.30 mm apart. Bright fringes are observed on a screen 2.0 m away. How far apart are the bright fringes on the screen?
- A1.3 mm
- B1.5 mm
- C3.0 mm
- D6.0 mm
As printed in the paper
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Correct answer: C. 3.0 mm
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