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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
Name two natural sources of light.
Name any four man made sources of light.
Fill in the blank
Speed of light in vacuum is .................
Write true or false
The moon has its own light.
Write true or false
The stars have no light.
Write about two everyday situations that tell you that light travels in a straight line.
Match the following.
| 1. | Ratio of height of image to height of object. | Concave mirror |
| 2. | Used in hairpin bends in mountains. | Total internal reflection |
| 3. | Coin inside water appearing slightly raised. | Magnification |
| 4. | Mirage | Convex mirror |
| 5. | Used as Dentist’s mirror. | Refraction |
If the energy of incident beam and the scattered beam is the same, then the scattering of light is called as ______ scattering.
Velocity of light is greater in denser medium than in rarer medium
Look at the figure given in the following figure.
Will there be any difference in the shadow formed on the screen in A and B.
