6A40.11 - Refraction of light ball in water
To demonstrate the refraction of light between an air/water interface using a ball placed in a trough.
Position the ball roughly in the center of the tray and place the tray on the front corner of the lecture bench near the sink. Mark the ball's front-to-back position with a piece of tape on the side of the tray for reference should the ball move when water is added to the tray. Use the golf ball with embedded magnet to fix ball on surface of the tray in order to stop it from moving when water is added. Fill a 4-L beaker with water. Fill the tray with water until 25% of the ball is under the water.
First, ask the students, how many can see the yellow ball? Then carefully pour the 4-L beaker of water into the tray. The ball should be fully submerged under the water. Then, ask the students, how many can see the yellow ball now? More students should be able to see it then.