Asked in
Speed of Light

What is the speed of light through earth's atmosphere?


User Avatar
Wiki User
March 26, 2009 2:26AM

The speed of light is not always fixed at 299792458 m/s. In earth's atmosphere, the speed of light slows, though this is negligible. In water, light travels at 75% of c, and in a diamond, light travels at .40 c. C is the speed of light, rounded to 300,000 km/s.