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Question

A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through opposite face is 4 cm. The refractive index of material of cube is


  1. 1.5

  2. 1.6

  3. 2.0

  4. 2.5


Solution

The correct option is A

1.5


real depthapparent depth=R.I(μ)

h16=μ

h1=6μ

Similarly h24=μ

h2=4m

h1+h2=15cm=10μ

μ=1.5

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