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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
Differentiate between the luminous and non-luminous bodies. Give two examples of each.
What do we call a body that shines on its own?
What do we call a substance through which light passes? Give an example of such a substance.
Tick the correct answer.
Light is a font of
Tick the correct answer.
The natural source of light is
Answer the following.
What is meant by luminous intensity? What is one lumen?
Answer the following.
Differentiate between luminous and non-Luminous objects.
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
State whether true or false. If false, correct the statement.
If a ray of light passes obliquely from one medium to another, it does not suffer any deviation.
Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
