1. What is meant by diffraction? How is it different than refraction or reflection? 2. The diagram below represents two waves of equal amplitude and frequency approaching point P. As the two waves pass through each other, how will point P move? Explain. 3. Why are low pitched sounds such as the rumble of a moving truck more easily heard around corners an through doors than high pitched sounds such as whistles? 4. The diagram below represents two waves of equal amplitude and wavelength traveling through a rope. Draw a diagram showing what the rope will look like when the two waves meet in the middle. Draw a second diagram showing what the rope will look like a short time later