HOW DOES THE DIRECTION CHANGE WHEN LIGHT PASSES FROM ONE TRANSPARENT MEDIUM INTO ANOTHER?
Materials: Rectangular water tank, laser pointer, straight pins, protractor, foam board base Imagine that you have a transparent plastic block and a laser pointer which emits a narrow, straight beam of red light. The light direction (beam) and the block have the orientation as shown in the picture below. What do you think will be the direction of the light beam AFTER the beam emeges from the block? How did you decide? The Activity 1. Cover the foam board with a sheet of unlined paper. Place the rectangular tank near the center of the paper. Carefully fill the tank with water. 2. Lightly trace along the edges of the block so you can locate the tank if it should be moved. You will also need this outline for your measurements later. 3. Put the laser pointer on one of the long sides of the tank. Angle the pointer so that the light strikes the first surface at an angle near 45°. The initial setup is indicated below. 4. Starting on the opposite side of the block locate the position of the la
