 So here we are in the lab room and I have a polarizing filter now these polarizing filters have arrows on them telling you Which way they're blocking out the light and our first experiment. We're going to look up just at the normal overhead classroom lights So here they are just through the regular camera Then I've got my filter and I'm going to put my filter up here in front of the camera and then I'm going to Rotate I'm rotating it now the filter around and The question is is does the brightness change significantly as I rotate that filter in different directions?