Can a body be luminous at some point of time and non-luminous at others?
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Question:
Can a body be luminous at some point of time and non-luminous at others?
Answer:
Light is a combination of electrical and magnetic energy which can pàss through transparent and translucent objects. The objects which do not have its own light is known as non-luminous objects.
Examples of luminous objects are:
✓ the sun
✓ flame in a lamp
✓ tube light
✓ electric bulb
Examples of non-luminous objects are:
✓ the earth
✓ moon
✓ a piece of cloth
✓ coal
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