science
Grade-7
Easy

Question

The speed of light is ___ x 108 m/s.

hintHint:

Mention the speed of light in air. Speed of light in air is less than that in vacuum.

The correct answer is: 3


    The speed of light is 3 x 108. m/s. Light travels the fastest in vacuum. The speed of light in air is also equal to 1,079,252,848.8 (1.07 billion) km per hour. More the refractive index of the medium, slower will be the speed of light.

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