73 The ……. particles can be seen moving in a beam of sunlight in a dark room.

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Solution

The dust particles can be seen moving in a beam of sunlight in a dark room.
We can see the path of a beam of sunshine as it enters a dusty room through a window.
The light beam is scattered all over the room due to microscopic dust particles in the air.
Therefore, The dust particles can be seen moving in a beam of sunlight in a dark room.

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Similar questions

Q. (a) What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain) during Brownian motion.
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When a beam of sunlight enters a room throuth a window, we can see tiny particles X suspended in a gas (or rather a mixture of gases )Y which are moving rapidly in a very haphazard manner.

(a) What could particles X be ?

(b) Name the gas (or mixture of gases) Y.

(d) What is causing the movement of particles X ?

(e) What conclusion doed the existence of this phenomenon give us about the nature of matter ?

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in a beam of sunlight entering a room ,we can see some dust partiles moving in haphazard way in the air why do these dust particles move

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