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Q.

In air, the speed of light is ____ $\times 1 0^{8} m / s$ .

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Detailed Solution

In air, the speed of light is

3 \times 1 0^{8} m / s

.
Light travels at a speed of

300, 000 km / s

or

3 \times 1 0^{8} m / s

in the air. The speed of light in a vacuum is almost the same as it is in vacuum. Its speed in water is

2.25 \times 1 0^{8} m / s

and in glass, it is

2 \times 1 0^{8} m / s

. Depending on the medium, light moves at a different speed..

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