ICSE Class 10 Physics 2017 Solved Paper

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Question : 11
Total: 65
State the conditions required for total internal reflection of light to take place.
Solution:  
The two necessary conditions for the total internal reflection are :
(i) The light must travel from a denser to a rarer medium.
(ii) The angle of incidence must be greater than the critical angle for the pair of media.
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