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A ray of light travels in medium of refr...

A ray of light travels in medium of refractive index `mu`. It incidents at a surface in contact with air at `45^@`. For what value of `mu`, this ray will undergo total internal reflection ?

A

`mu`=1.33

B

`mu=1.40`

C

`mu=1.50`

D

`mu=1.25`

Text Solution

Verified by Experts

The correct Answer is:
A, C
For total internal reflection,
`mu ge (1)/(sinC) ge sqrt2 ge 1.414`
`therefore mu=1.50`
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