why do dust particles move when a beam of sunlight enters th room ?

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Solution

Actually they are constantly moving in the atmosphere around us. But when a sunbeam falls on them we are able to visualize their movement.
It is not that they move only in presence of sunlight.

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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.)
(b) In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?

What happens when a beam of sunlight enters a dusty room through a window ? Explain your answer.

Q. When a beam of sunlight enters a dusty room, its path becomes visible to us. Which effects of light is discussed here?

Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.

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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why do dust particles move when a beam of sunlight enters th room ?

Actually they are constantly moving in the atmosphere around us. But when a sunbeam falls on them we are able to visualize their movement. It is not that they move only in presence of sunlight.

Actually they are constantly moving in the atmosphere around us. But when a sunbeam falls on them we are able to visualize their movement.
It is not that they move only in presence of sunlight.