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Q 1.
Name the man-made sources of light?
Ans.
1.Oil lamp
2.Candle 3.Torch |
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Q 2.
What are the natural sources of light?
Ans.
1.sun
2. Moon 3. Fire 4. Firefly |
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Q 3.
Examples of non-luminous objects?
Ans.
Moon, chair, fan and door.
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Q 4.
Examples of opaque objects?
Ans.
Wood and stone.
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Q 5.
Sun, torch, moon and lights which are non-luminous object?
Ans.
Moon.
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Q 6.
How shadow form?
Ans.
When an opaque object comes in the path of light shadow is formed.
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Q 7.
Examples of luminous objects?
Ans.
The sun, The torch bulb etc..
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Q 8.
If an object is not allowing a light pass through it, is known as?
Ans.
Opaque.
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Q 9.
If an object is allowing light pass through it is called?
Ans.
Transparent.
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Q 10.
Name the object in which we can see very clearly is called?
Ans.
Transparent.
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Q 11.
Name the object in which we can see but not very clearly is called?
Ans.
Translucent.
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Q 12.
How light travels?
Ans.
In straight line.
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