Question

State the speed of light in (i) air, (ii) water, and (iii) glass.​

Answer 1

Answer:

(i) Speed of light in air is 3*10^8 m/s and speed of light in common glass is 2*10^8 m/s.

(ii) Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water.

(iii) Light can travel 200,000 kilometers per second in glass.

Explanation:

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Answer 2

Answer:

•Approximately 300,000 km per sec in vaccum

•225,000 km per sec in water .

•200,000 km per sec in glass.

•Light in air is 1.0003 timer slower than vacuum.