Question

speed of light in air ​

Answer 1

Answer:

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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

Answer 2

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 1.000, so the speed of light in air is about 90 km/s (56 mi/s) slower than c.

Meters per second : 299792458

Miles per second : 186000

One light year : 1.0 year

Kilometres per hour : 1080000000

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