Question

when beams of sunlight enters througha window we can see tiny particles X suspended in a gas Y which are moving Rapidly in very haphazard manner :
a) what could particles X be ?
b) name the gas Y ?
c) what is the phenomenon exhibited by X know as ?
d) what is causing the moment of particles X ?
e) what conclusion does the existence of this phenomenon give us about the nature of matter ?

Answer 1

a) - the particles X - dust and smoke
b) Air
c) the phenomenon is called tyndall effect
d) due to the scattering of light.... beam of lights make the particles move
e) this is a type of colloidal solution/aerosol of solid in air...