Rahil performs an experiment in a dark room, where all curtains are pulled down. He then open a small slit from the window such that a beam of sunlight could enter the room. He observes tiny shining particles moving in the beam of sunlight. What does the presence of these shining particles show?
(a)Air has oxygen.
(b)Air has nitrogen.
(c)Air has water vapour.
(d)Air has dust particles
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here is your ans.
"air has dust particles"
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It shows that air has dust particles. (option d)
- Air has dust particles in it and it is called particle matters.
- These dust particles in the air may occur due to many reasons.
- They are tiny particles of solids or liquids present in the air.
- These particles are seen through when a beam of light passes through the air.
- This may indicate that there are very many dust particles in the air around your surroundings, and would suggest that the air be purified.
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