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CBSE Class 10 Answered

Define Self-luminous and non-luminous sources of light with examples.
Asked by bhaipandu | 23 Mar, 2010, 01:23: PM
Expert Answer

A luminous body can serve as a source of light. A luminous body is an object that shines by its own light. The sun is our chief source of light. It is naturally luminous. Fire, too, is luminous. A bonfire and a candle flame are luminous objects. Among other luminous objects are stars, fireflies, oil lamps, flashlights, electric lamps, and street lights.

A non-luminous body cannot serve as a source of light. A non-luminous body is an object that does not shines by its own light. It needs a luminous body in its surrounding whose light it can reflect and become visible. Examples of non-luminous objects are Trees, Books, Wall's etc.

Hope this helps.
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Answered by | 23 Mar, 2010, 03:26: PM
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