1. Waves are made in a pan of water by dipping a finger at a regular rate into the middle of the surface of the water. (a) Make a drawing showing three successive wave fronts. (b) Indicate the wavelength of this series of waves. (c) Draw four rays. 2. What does reflection mean? What is the law of reflection? 3. What is refraction? What change will cause a wave to undergo refraction? 4. Water waves entering deeper water undergo refraction. Which properties of the waves change: velocity