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ICSE Class 10 Physics 2018 Solved Paper

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Question : 15
Total: 78
State the relation between the critical angle and the absolute refractive index of a'medium.
Solution:  
The relation is
µ‌medium ‌=‌
1
sin‌ic
=cosec‌ic
where µ‌medium ‌ is the absolute refractive index of the medium and ic is the critical angle for the medium.
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