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1 February, 18:13

A biologist keeps a specimen of his favorite beetle embedded in a cube of polystyrene plastic. The hapless bug appears to be 2.0 cm within the plastic.

Part A) What is the beetle's actual distance beneath the surface?

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  1. 1 February, 21:53
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    the beetle's actual distance beneath the surface, d = 3.2 cm

    Explanation:

    The refractive index for the plastic is about 1.60

    For overhead viewing, the expression for refractive index is

    n = actual depth / apparent depth

    Rearrange for actual depth

    actual depth d = n x apparent depth

    d = 1.60 x 2.0 cm

    d = 3.2 cm
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