Question

1. What do you understand by the term light?
2. Define luminous body. Give four examples of luminous bodies.
3. What are non-luminous bodies? Give four examples of non-luminous bodies.
4. Why is moon a non-luminous body?
5. Name the prime source of light for the people living on the earth.
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Answer 1

Answer:

Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. ... Light exists in tiny energy packets called photons. Each wave has a wavelength or frequency.

A bonfire and a candle flame are luminous objects. examples of luminous body : Lighted candle. torch bulb.

Examples of non-luminous objects are:

the earth.

moon.

a piece of cloth.

coal.

Moon is non-luminous body because it shines by reflecting the sunlight falling on it.

Sun

Answer: Sun is the prime and major source of light for the people living on the earth.