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Calculate time for light to travel vertically

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A pond with a total depth (ice + water) of 4.01 m is covered by a transparent layer of ice, with a thickness of 0.134 m. Calculate the time required for light to travel vertically from the surface of the ice to the bottom of the pond.

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The expert calculates the time for light to travel vertically. A complete, neat and step-by-step solution is provided.

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Velocity of the light in vaccum, c = 3 * 10^8 m/s

Velocity of the light in ice, v = c/n, where n = refractive index of ice = 1.3

Velocity of ...

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