Today, we will learn about light waves and see how they travel. Light moves in waves, which can bounce off of or go through materials.
Activities Have students shine flashlight beam through their hands.
We can see that flesh and bone won't allow light to pass through. This bouncing of light off a surface is called reflection. Shine flashlight beam through fish tank of water. Hold dark paper at outside end of tank to see evidence that light is coming through the tank. Look down into the water and see reflection in it.