Question

When and who found the existence and motion of particles in liquids?

Answer 1

The existence and motion of particles in liquids:

An English Botanist, Robert Brown in1827 found the best evidence for the existence and motion of particles in liquids.

Brownian motion:

1. He observed a continuous and rapid zig-zag motion in colloidal solution under the microscope.
2. He called this continuous and rapid zig-zag motion of the colloidal particles as Brownian motion.