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प्रश्न
What do you understand by candle power?
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उत्तर
To measure the brightness of light in comparison with the brightness of a candle. The unit of candle power is used.
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संबंधित प्रश्न
Fill in the blank
A medium through which light cannot pass is called the ....................
Select the correct alternative.
The natural source of light is
Select the correct alternative.
The luminous body is
How does light make an object visible?
What do we call a substance through which we cannot see light? Give an example of such a substance.
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
Fill in the blank
Speed of light in vacuum is .................
Write whether of the following objects are luminous or non-luminous.
| Object | Luminous/Non-luminous |
| A book | |
| A burning candle | |
| A wax cloth | |
| A pencil | |
| A pen | |
| A light bulb | |
| A tyre | |
| A torch |
________ objects allow all the light to pass through them.
A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is ______.
