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Light — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsLight2 Marks
Question
(a) What do you understand by the term refraction of light?
(b) How does the light deviate when it travels from :
(i) a rarer to a denser medium
(ii) a denser to a rarer medium?
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Answer

(a) Refraction : The phenomenon, due to which a ray of light deviates from its original path, while travelling from one optical medium to another optical medium is called refraction.
(b) (i) When light travels from a rarer to a denser medium, it bends towards the normal, drawn at the point of incidence.
(ii) When light travels from a denser to a rarer medium, it bends away from the normal.

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