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How can dust particles be seen in the air?

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Through a narrow beam of the torch in the lighted room.

Dust particles are seen in laser light.

Through a narrow beam of sunlight in the dark room.

Dust particles can’t be seen with the naked eye.

answer is C.

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Detailed Solution

When a narrow sunbeam enters a dark closed room making a path then the dust particles are visible moving in that path of light. This also proves that air contains dust particles.

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