O-LevelPhysicsLight5054/11 · May/June 2023 · Q221 Mark
The diagram shows white light entering a prism. What happens at point X and what is the colour of the light that strikes the screen at point Z?
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.
Aat point X: dispersion only; at point Z: blue light
Bat point X: dispersion and refraction; at point Z: blue light
Cat point X: dispersion and refraction; at point Z: red light
Dat point X: refraction only; at point Z: red light
✓ Correct answer
C: at point X: dispersion and refraction; at point Z: red light
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