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प्रश्न
Fill in the blank.
The sun is a ............... source of light.
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उत्तर
The sun is a natural source of light.
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संबंधित प्रश्न
Write true or false of the following statement.
The moon is self-luminous.
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
What do we call an electric bulb producing light?
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
What do we call a substance through which we cannot see light? Give an example of such a substance.
What do you understand by candle power?
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 |
Why are traffic signals red in colour?
What happens to light when it gets dispersed? Give an example.
Observe the picture given in the following figure carefully.
A patch of light is obtained at B, when the torch is lighted as shown. Which of the following is kept at position A to get this patch of light?
