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CAIE IGCSE Physics 3.2.4.1 Dispersion of Light As Illustrated By Questions

Practise tracing coloured rays through both faces of a prism and explain white-light separation through the different speeds and refractions of each colour.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Trace prism dispersion: blue or violet bends more toward the normal than red, rays separate further on exit, and different colours have different speeds, indices and refraction angles.

CAIE IGCSE Physics 3.2.4.1 Dispersion of Light As Illustrated By Questions question 1

[Maximum number: 2]

Fig. 6.3 shows yellow light passing through a glass prism.

Fig. 6.3

Fig. 6.3

Blue light enters the prism along the same path as the yellow light.
On Fig. 6.3, draw the path of the blue light as it enters, passes through and leaves the prism.

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