Question

what is the speed of light in air???
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Answer 1

Answer:

300000km/sec

Explanation:

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Answer 2

Answer:

Light

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.

One light year: 1.0 year

Metres per second: 299792458

Miles per second: 186000

From Moon to Earth: 1.3 s