Waves Interference (This lesson is designed for a student working remotely.) This lab uses the Waves Interference simulation from PhET Interactive Simulations at University of Colorado Boulder, under the CC-BY 4.0 license. https://phet.colorado.edu/sims/html/wave-interference/latest/wave-interference_en.html Learning Goals: Students will be able to: A. Create an interference pattern with two sources, and determine the ways to change the pattern. B. Find points of constructive and destructive interference by eye and by using the detectors. C. Put up a barrier to see how the waves move through one or two slits. What sort of pattern do the slits create? How can you change this pattern? Develop your understanding: Open the Interference screen, then explore to make water waves with varying patterns. 40 PHET Explain your understanding: 1. Consider these three patterns of water waves: A B C a. Describe the similarities and differences of the three patterns of water waves. Experiment to make similar patterns, then explain how you can use the simulation to make each. C. Why do the directions say "similar patterns"? 2. Experiment to make waves of different interference patterns with water, sound, and light. Use your own words and captured images from the simulation to show you can meet learning goal A: "Create an interference pattern with two sources, and determine the ways to change the pattern." 3 . Use the Water Level tool to understand what is happening in the water tank: a. Measure the dark and light areas of waves made with only one faucet. Insert a screen image to help explain your answer. b. Make waves using both faucets and measure the dark, light and fuzzy spots. Insert a screen image to help explain your