A-LevelPhysicsSuperposition9702/12 · May/June 2023 · Q281 Mark
The diagram shows a view from above of a double-slit interference demonstration. L is a monochromatic light source with a vertical filament. B is a barrier with two narrow vertical slits and S is a screen upon which interference fringes form. [Figure 28.1] The intensity is I at the point on the screen where the centre of the fringe pattern forms. When one of the slits is covered, what is the intensity at the same point on the screen?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AI/√2
BI/2
CI/(2√2)
DI/4
✓ Correct answer
D: I/4
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Superposition and see which topics are most likely to come up next.
Sign up free →