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A thin convex lens L (refractive index =...

A thin convex lens L (refractive index = 1.5) is placed on a plane mirror M. When a pin is placed at A, such that OA = 18 cm, its real inverted image is formed at A itself, as shown in figure. When liquid of refractive index is put between the lens and the mirror , the oin has to moved to A', such that OA'=27cm, to get its inverted real imaged at A' itself. The value of `mu_(l)` will be

A

`(4)/(3)`

B

`sqrt3`

C

`(3)/(2)`

D

`sqrt2`

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The correct Answer is:
A
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