How fast does light travel? What determines the speed of light propagation?
| November 13, 2020 | Education
Light in air and vacuum travels at a speed of 300,000 km / s. The speed of light depends on the medium in which the light travels. So, in sugar, the speed of light is 192,300 km / s, in diamond – 124,100 km / s, rock salt – 194,300 km / s, in milk – 222,200 km / s, in gasoline – 214,300 km / s (speeds lights are given at a body temperature of 20 ° C.
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