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A small air bubble in a sphere of glass ...

A small air bubble in a sphere of glass with radius 4 cm appears to be 1 cm from the surface when observed along a diameter. Find the true position of the air bubble.

A

`1.2 cm`

B

`3.2 cm`

C

`2.8 cm`

D

`1.6 cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`v=1cm, R=2 cm`
By using `(mu_(2))/(v)-(mu_(1))/(u)=(mu_(2)-mu_(1))/(R)`
`(1)/(-1)-(1.5)/(u)=(1-1.5)/(-2)impliesu=-1.2 cm`
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