what is the refractive index of water
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In optics the refractive index or index of refraction n of a substance is a dimensionless number that describes how light, or any other radiation, propagates through that medium. ... For example, the refractive index of water is 1.33, meaning that light travels 1.33 times as fast in vacuum as it does in water
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Some typical refractive indices for yellow light (wavelength equal to 589 nanometres [10−9 metre]) are the following: air, 1.0003; water, 1.333; crown glass, 1.517; dense flint glass, 1.655; and diamond, 2.417.
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