O-LevelPhysicsLight5054/11 · May/June 2023 · Q211 Mark
A ray of light is incident on a plastic block in air, at an angle of incidence i. The refractive index of the plastic is n. The light ray refracts along the plastic-air boundary when it reaches X. Which equation is correct?
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.
Asin i = sin 41° / n
Bsin i = n / sin 49°
Csin i = n x sin 41°
Dsin i = n x sin 49°
✓ Correct answer
C: sin i = n x sin 41°
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