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CAIE IGCSE Physics 3.2.2.7 Refractive Index N Sin I Sin R Questions

Practise using n = sin i / sin r with ray diagrams, angles to the normal, and refractive index calculations.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • State that a scalar has magnitude only whereas a vector has both magnitude and direction.
  • Classify common quantities such as speed, mass and energy against velocity, force and momentum.
  • Justify a scalar or vector classification using the presence or absence of direction.

CAIE IGCSE Physics 3.2.2.7 Refractive Index N Sin I Sin R Questions question 1

[Maximum number: 2]

Fig. 5.1 shows a ray of yellow light incident on a glass prism ABC .

Fig. 5.1

Fig. 5.1

The critical angle for the glass is 42∘42^{\circ}.

Calculate the refractive index of the glass.

Show your working.

refractive index =
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