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प्रश्न
Name any four man made sources of light.
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उत्तर
1. An electric bulb
2. Candle
3. An oil lamp
4. A torch
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संबंधित प्रश्न
Write true or false of the following statement.
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| Object | Luminous/Non-luminous |
| A book | |
| A burning candle | |
| A wax cloth | |
| A pencil | |
| A pen | |
| A light bulb | |
| A tyre | |
| A torch |
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