Question

When some smoke particles in air are observed under the microscope, the smoke partides appear to be moving
randomly and constantly. Explain Why​

Answer 1

Answer:When an air particle bombards a smoke particles, the smoke particle moves to the same direction as the air particle that hit it. When another air particle hits the smoke particle, it changes its direction to that of the second air particle, and so on. This is called Brownian motion.

Answer 2

Answer:

The air molecules collides the smoke particles from different directions and at different times. Due to uneven collisions, the smoke particles are at random motion. Conclusion: The air molecules are moving at constant random motion at high speeds.