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Calculating the Speed of Light in Water
A 2 column by 5 row table. Column 1 is titled Material and contains the following entries: Vacuum, Air, Water, Diamond. Column 2 is titled Index of Refraction and contains the following entries: 1.00, 1.0003, 1.33, 2.42.
Light travels at 3.0 × 108 m/s in a vacuum. Use the index of refraction for water to determine the speed of light in water. Round your answer to the nearest tenth.

× 108 m/s

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Answered by GPT-5 mini AI
Use v = c / n.

v = (3.0 × 10^8 m/s) / 1.33 = 2.2556... × 10^8 m/s ≈ 2.3 × 10^8 m/s.