make a list some luminous and substance and classify them into natural and artificial source of light
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luminous objects can be natural as well as manmade. one of the examples of natural luminous objects are- torch bulb, stars, sun, lighted candle. artificial luminous objects are those cannot emit their own light. some of the examples of the artificial luminous objects are- paper, pencil, wood, human beings, moon.
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Answer:
natura- stars,sun etc
artificial-torch,bulb,candle,etc.
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