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A ray of light normally on one of the fa...

A ray of light normally on one of the faces of a right-angled isosceles glass prism is found to be totally reflected. What is the minimum value of the refractive index of the material of the prism ?

Text Solution

Verified by Experts

Here `45^(@) gt C`
`because sinC = (1)/(mu)`
`:. sin 45^(@) gt (1)/(mu)`
or `(1)/(sqrt(2)) gt (1)/(mu)` or, `mu gt sqrt(2)`
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