Multiple choice

Which of the following objects is a luminous object?

  1. Sun

  2. Moon

  3. Book

  4. Iron
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A Correct answer
Explanation

Luminous objects are those which emit out their own light, e.g. sun, stars, tube light, bulb, etc., whereas non-luminous objects are those which shine by reflecting the light of the luminous objects. They do not emit their own light, e.g. moon, book and iron do not shine at all and are opaque objects.

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