I have two queries:
- if unpolarised light passes through a polaroid filter so that light coming out of the filter becomes polarised, would intensity (brightness) of the light become reduced as a result?
- if you have a polarized wave, and it passes through a filter that has a gap which is at an angle to the plane of this polarized wave's vibrations (but not perpendicular to it), would anything come out of the filter? (just to give an example, say you have a wave vibrating up and down in the vertical plane, I understand that if you have a filter which only has horizontal gaps then nothing will come out of the filter, but what if the gap was at an angle somewhere between vertical and horizontal?)
if I haven't made myself clear, please tell me, I can get hold of the textbook and scan the diagram