Question

Check the state of polarization of a random room lights by looking at them through a polarizer and rotating it through 360 degrees.

Would you observe any significant variation in the intensity of the light transmitted through the polarizer?

Are the room lights you're observing polarized or unpolarized?

Answer 1

This question is completely experimental.

When we rotate the polarizer through 360 degrees, there will be no significant change in the intensity of the light.

As from the above observation, it is clear that the room light is not linearly polarized because there is no variation of light intensity.

I am focusing only on linearly polarized because similar behavior will be observed when the light is circularly polarized. But if you stick to only linearly polarization then the answer is "NO", the room light is not polarized.