Combo Post

Didn't a chance to post yesterday, but everyone knows what we did so who really cares? B Block worked on their light intensity and polarization lab, which we discussed in class today and reinforced the ideas that we went over in our class lectures. C, E and F Blocks took time to go over the ideas of color and polarization. We had already done lab work on polarization, so that concept flowed smoothly, but folks usually have a little trouble with the additive and subtractive color systems. Understanding the systems is not hard, but understanding what you would see when you mix colors of light or pigment or shine light on a colored object can be troublesome. We took time in class today to go over that homework and try and get everyone on board before we took our customary walk through the chapter material (also applies to B Block)in preparation for tomorrow's test. Remember your sign conventions for your mirror problems, forget about parabolic mirrors and make sure you can draw a ray diagram for real image formation by concave mirrors. I'm in before school tomorrow, so stop by if you need any last minute help. Starting on Thursday - refraction and lenses!