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प्रश्न
Why do objects in a room become visible even if sunlight does not enter it?
उत्तर
When the light falls on an object, it scatters even if the sunlight does not enter a room. due to scattered light., the object becomes visible.
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संबंधित प्रश्न
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
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A ............. is formed when the path of light is obstructed by an ..............
Answer the following.
List four natural sources of light.
Answer the following.
What is meant by luminous intensity? What is one lumen?
Answer the following.
Distinguish between transparent, translucent, and opaque objects.
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 |
a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
What is light?
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?
