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प्रश्न
Can light travel in vacuum?
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उत्तर
Yes, light can travels in vacuum or air, a distance of nearly 299, 792, 458 metre (or nearly 3 × 108 metre) in one second. Thus, the speed of light in vacuum (or air) is 3 x 108 m s’1 nearly.
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संबंधित प्रश्न
Write true or false of the following statement.
The moon is a natural source of light.
Fill in the blank.
The sun is a ............... source of light.
What do we call a substance through which we cannot see light? Give an example of such a substance.
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
Light is a form of ______.
Write about two everyday situations that tell you that light travels in a straight line.
Velocity of light is greater in denser medium than in rarer medium
What happens to light when it gets dispersed? Give an example.
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason.
A ray of the light incident along normal to the mirror ______ its path.
