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CAIE IGCSE Physics 3.2.2.5 Internal Reflection and Total Internal Questions

Practise stating the two conditions for total internal reflection and trace rays through water, glass or an optical fibre with correct incidence geometry.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Distinguish scalars from vectors by direction and classify common physics quantities.

CAIE IGCSE Physics 3.2.2.5 Internal Reflection and Total Internal Questions question 1

[Maximum number: 2]

Fig. 5.1 shows an optical fibre made of the glass described in (i).

Fig. 5.1

Fig. 5.1

On Fig. 5.1, draw carefully a ray of light in the fibre undergoing total internal reflection.

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