Today in the beginning of class we turned in the Starlight Starbright pages from our lab manual, EM table and the Property of Light questions. Afterward Mr. Ebersole did the color demo with the spinning glow sticks. From this we learned what colors are made when you mix different lights. . Then after discussing the difference between the primary colors we learned in art class and the primary colors according to physics, Mr. Ebersole and Lauren Buck had a lively debate over why cyan is called cyan. Next, the class was told about our color presentations that are going to be done with our table. The color presentations are due April 17th. Today while completing the color packet we also learned the difference between how light acts and how pigment acts. Pigment is fine particles that absorb some light and reflect others. We learned a lot about mixing colors and how light and pigment act differently when mixed. The homework that should be completed for April 11th is the color packet which was pages 187-189. Also to get ahead of the game we were told that we could start the lab pages 179-185 and groups should begin work on their color presentations.
Question of the day: Why are there different primary colors for light than there are for pigments?
Answer of the day: The mixing of pigments is very different from mixing light. Pigment make color using selective absorption of light. Mixing pigments results in a subtraction of colors while light is additive so different colors are created. For example if you add red, green and blue light, white light results but if you mix red, green and blue pigments you will get a dark brown.
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