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A ray of light incident normally on one ...

A ray of light incident normally on one face of a right isosceles prism is totally reflected. What must be the minimum value of refractive index of glass ? Give relevant calculations.

Text Solution

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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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