Physics-
General
Easy

Question

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 & B when seen from vertically above is equal to

  1. 2 mm    
  2. 3 mm    
  3. 4 mm    
  4. none of these    

The correct answer is: 3 mm

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