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Question

A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed througth one face is 6 cm and when viewed through the opposite face is 4 cm. Then the refractive index of the material of the cube is :
  1. 2
  2. 2.5
  3. 1.6
  4. 1.5

A
1.5
B
2
C
1.6
D
2.5
Solution
Verified by Toppr

Let the real depth of the object from one side be x

Then, μ=x6=15x4

Solving for x, gives us,

2x=453x

which gives, x=9

Thus, now we can find the value of μ to be =96=1.5

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