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प्रश्न
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
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उत्तर
We will observe randomly moving dust particles in the beam of light. This confirms the presence of dust particles in the air.
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संबंधित प्रश्न
Fill in the blank:
_____________ discovered the oxygen gas.
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Tick (√) the correct alternative from the choice given for the following statement.
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