The main difference between plane polarized light and ordinary (or unpolarized) light lies in the direction of oscillation of the light waves. Here are the key differences: Plane Polarized Light:
Vibrations occur in a single plane only.
Oscillations are in one direction only.
Constant phase difference between the electric field components.
Can be produced by passing unpolarized light through a polarizer or an organic filter.
Ordinary Light:
Vibrations occur in random directions.
Oscillations are in random directions.
Phase difference changes unpredictably.
Light source includes sunlight and other sources of natural light. In summary, plane polarized light has its vibrations occurring within them in a single plane, whereas ordinary light has vibrations occurring within them at random angles without any plane.