what is the speed of light in air?
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Explanation:
For example, for visible light, the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200000 km/s (124000 mi/s); the refractive index of air for visible light is about 1.0003, so the speed of light in air is about 90 km/s (56 mi/s) slower than c.
Metres per second: 299792458
Miles per second: 186000
One light year: 1.0 year
From Moon to Earth: 1.3 s
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Answer:
299792458m/s
Explanation:
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