Question

what is diffusion?use the idea of diffusion to explain how the smell of perfume travel.

Answer 1

The intermixing of particles of two different types of matter on their own is called diffusion

Answer 2

As the person who answered before me said,it is the intermixing of particles of the same type of matter.When perfume is sprayed,the particles of perfume diffuses with the particles in the air.You know that particles have space between them.So actually what happens is,the particles of perfume occupy the space between particles of air.