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प्रश्न
Fill in the blank
Speed of light in vacuum is .................
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उत्तर
Speed of light in vacuum is 300000 km/sec
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संबंधित प्रश्न
Can light travel in vacuum?
Select the correct alternative.
The luminous body is
What do we call an electric bulb producing light?
From among the following objects, list out the opaque, translucent, and transparent bodies in the space provided below:
A glass strip, an ordinary paper, greased paper, tracing paper, polythene sheet, wooden piece, steel plate, glycerine, kerosene oil, mustard oil, grounded glass, stone, book, water, and milk.
Opaque Transparent Translucent
The sun and ______ are the natural sources of light.
Fill in the blank
The brightness of light is measured in ...................
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
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 |
List any five properties of light.
State whether the following statement is True or False.
An object can be seen only if it emits light
