A student measures the absolute refractive index of water as 1.33. What does this mean about the speed of light in water compared to air?
Light travels slower in water by a factor of 1.33 compared to air
The refractive index of a medium is defined as \(n = \dfrac{c}{v}\), where c is the speed of light in air and v is its speed in the medium.
Since \(n = 1.33\) for water, light travels 1.33 times slower in water than in air.
Hence, this is the correct answer.
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