“Under the microscope one, to some extent, immediately sees a part of thermal energy in the form of mechanical energy of the moving particles.” —A. Einstein 1915
What it Shows
Tiny latex spheres in water, viewed under a microscope, undergo a kind of...
Smoke cell under microscope; smoke particles seen bombarded by air molecules.
What it Shows
Brownian motion shows direct evidence of the incessant motion of matter due to thermal energy. Here we use the random bombardment of smoke particles by air...
Cooling a gas causes a proportional decrease in volume with the drop in absolute temperature. A gas such as helium, which remains close to ideal at low temperatures, shows a four-fold decrease in volume...