Consider the situation as shown in figur...

Consider the situation as shown in figure. The point O is the centre. The light ray forms an angle of `60^(@)` with the normal.

The normal makes an angle `60^(@)` with the horizontal and the mirror makes an angle `60^(@)` with the normal. The value of refractive index of that spherical portions, so that light ray retraces its path is

`sqrt2`

`2/sqrt3`

`3/2`

`sqrt3`

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The correct Answer is:

`mu=sin 60^@/sin 30^@=sqrt3`

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DC PANDEY ENGLISH-REFRACTION OF LIGHT-Level 2 Single Correct

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