Work in groups of four and proceed to each station. Complete each demonstration activity and answer each of the questions. Each group may submit a single write up. It must be typed, but calculations and diagrams can be written by hand. Label each set of questions with the appropriate demonstration name, number each question, and leave several space between each answer.
Colors Use the three light sources to demonstrate the effect of mixing red, blue, and green light.
Adjust the direction of the sources so that they are projected on the screen. Red, blue, and green are called additive primary colors. Two colors of light that add to make white are called complementary. The tank is filled, and a very small amount of powdered milk is dissolved in the water. Shine the flashlight through the tank, and observe the appearance of the light beam along the length of the tank.