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A small air bubble is trapped inside a ...

A small air bubble is trapped inside a transparent cube of size `12 cm`. When viewed from one of the vertical faces, the bubble apears to be at `5 cm`. From it. When viewed from opposite face, it appears at `3 cm` from it.

A

The distance of the air bubble from the first face is `7.5 cm`

B

The distance of the air bubble from the first face is 9 cm

C

Refractive index of the material of the prism is `2.0`

D

Refractive index of the material of the prism is `1.5`

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