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A parallel sided block of glass of refractive index 1.5 which is 36 mm thick rests on the floor of a tank which is filled with water (refractive index = 4/3). The difference between apparent depth of floor at A and B when seen from vertically above is equal to

A

2mm

B

3mm

C

4mm

D

6mm

Text Solution

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The correct Answer is:
B
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