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When one observes a scratch on the bottom of a block of clear plastic, the scratch appears to be 2.5 cm below the top surface as viewed from above. The actual thickness of the plastic block is 3.0 cm. The index of refraction of the block is ______________.

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princessesther2011

Answer:

1.2

Explanation:

Index of refraction = actual thickness/virtual thickness

Actual thickness = 3cm, virtual thickness = 2.5cm

Index of refraction = 3/2.5 = 1.2