Question

Three videos show the motion of beads under 3 different situations:

I. a video of beads in water with the microscope flat on the table.

II. a video of beads in water with the microscope tilted.

III. a video of beads in water with the same microscope tilt but for a much longer time.

What is the varying effect of random and nonrandom motion on the particles of each video

Answer 1

Case I. In the video you would see the accounts in the same place assuming that the water is stagnant, the ambient lights would give us the clue that there is movement due to the reflection on the water.
case II. When the microscope is tilted, the beads would be seen oscillating harmonically when the water has wave movement, this would be seen when the water is beginning to have movement.

case III. The same happens in case II only that random movements began to be seen on the beads since the waves began to collide with each other, making interferences between them, which makes them oscillate without any apparent pattern, but in reality it they do following a certain harmonic wave pattern resulting from the interference of the waves on the water.