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प्रश्न
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 |
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उत्तर
| Object | Luminous/Non-luminous |
| A book | Non-luminous |
| A burning candle | Luminous |
| A wax cloth | Non-luminous |
| A pencil | Non-luminous |
| A pen | Non-luminous |
| A light bulb | Luminous |
| A tyre | Non-luminous |
| A torch | Luminous |
संबंधित प्रश्न
Write true or false of the following statement.
The moon is a natural source of light.
Fill in the blank.
The sun is a ............... source of light.
Fill in the blank.
A medium which allows light to pass through it easily is called the ...................
Explain the difference between a transparent, a translucent, and an opaque medium. Give two examples of each.
What do you understand by candle power?
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
Fill in the blank
Speed of light in vacuum is .................
The angle of deviation of light ray in a prism depends on the angle of ______.
State Rayleigh’s law of scattering.
Why are traffic signals red in colour?
