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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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| Column I | Column II | ||
| (a) | \[\boxed{\text{D}}\]\[\boxed{\text{I}}\]\[\boxed{\text{L}}\]\[\boxed{\text{L}}\]\[\boxed{\text{M}}\]\[\boxed{\text{W}}\]\[\boxed{\text{I}}\]\[\boxed{\text{N}}\] | (a) | `squaresquaresquaresquaresquaresquaresquare square` |
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