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ICSE Class 10 Physics 2018 Paper

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Question : 15 of 78
Marks: +1, -0
State the relation between the critical angle and the absolute refractive index of a'medium.
Solution:  
The relation is
µ  "medium"  =  1/sin  ic=cosecicµ_{\;\text "medium "\;}=\;{1}/{ sin \;i_c}={cosec} i_c
where µ  "medium"  µ_{\;\text "medium "\;} is the absolute refractive index of the medium and ici_c is the critical angle for the medium.
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