CAIE IGCSE Physics 3.2.2.8 Critical Angle Relation N 1 Sin C Questions
Practise applying n = 1 / sin c to connect refractive index with critical angle and total internal reflection.
- 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 3.2.2.8 Critical Angle Relation N 1 Sin C Questions question 1
[Maximum number: 2]
The critical angle of the glass in an optical fibre is 45∘.
Calculate the refractive index of the glass.
refractive index =
( n= ) 1.4
(n=)1/sincOR(n=)1/sincOR(n=)1/sin45
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