Question

Place the flat sides of the polarizers together and observe the room lights through both polarizers at the same time. Rotate one of the polarizers until the intensity is minimum. Is any light transmitted through both polarizers when the intensity is minimum? If some light is transmitted, does it have any color? If so, what is the color, and what do you conclude about how the polarizers behave as a function of wavelength (color)?

Answer 1

when we rotate the polarizers in such a way that their axis are perpendicular to each other, the intensity becomes minimum. In ideal cases, as intensity becomes zero, we won't be able to see any thing , it will be totally black. Whatever we see through the combination, will appear dark.

If some of the light is transmitted, then we will be able to see the color but with reduced intensity. Remember, polarizer can only alter intensity , so the color we see depends on the wavelength of light which is able to transmit.

Polarizer cannot alter wavelength of a light.