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Refraction of Light — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsRefraction of Light3 Marks
Question
PQ and PR are two light rays emerging from the object as shown in the figure below:

(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
(ii) Copy the ray diagram and complete it to show the position of the image of the object P when seen obliquely from above.
(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.
✓

Answer

(i) Critical angle
(ii)

(iii) Total internal reflection of light.

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