Hi all.. I don't understand polarisation. When unpolarised light is passed through a polarizer, the result is linearly polarised light with the E field oscillating in a direction parallel to the transmission axis of the polarizer. Say it passes through another sheet (analyzer) with its transmission axis at an angle theta to the transmission axis of the polarizer, then 'the component' of light parallel to the analyzer's transmission axis then let through. What I don't get is.. Havent you already extracted a certain E-field direction from the light when you let it through the polarizer.. How can it have more components (which the analyzer 'extracts')?? Similarly, when linearly polarized light is passed through birefringent material, it still splits in two?? ie waveplate theory..