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The speed of light in a vacuum will always be approximately 299,792,458 meters per second. However, light travels at slower speeds when propagating through mediums. The speed of light in a medium is determined by the mediums index of refraction. The index of refraction is calculated using the following equation:

n = c / v;

where "n" is the refractive index, "c" is the speed of light in a vacuum, and "v" is the speed of light in the medium.

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14y ago
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14y ago

velocity = frequency * wavelength

Therefore, frequency and wavelength both affect the speed of a wave.

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12y ago

density and temperature =)

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