When an incense stick(agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
When an incense stick is burnt, the incense present in it vaporizes because of heat. The vapours move rapidly in all directions due to the diffusion. The vapour mixes with air and reaches to us. In similar way we sense the good or bad smell from a distance.