PHY 112 PHY112 LESSON 12 PROBLEM SET 6 ANSWERS - GCU
PHY 112 Lesson 12 Problem Set 6 Answers (Grand Canyon University)
1. A speaker playing music is in room. A student standing in an adjacent room (marked by the X in the diagram) can hear the music through the open doorway. Apply Huygen’s Principle to show how the sound waves travel from the speaker to the observer. The first wavelet has already been drawn (5 points).
2. A laser beam with a wavelength of λ (475 nm) is incident on a diffraction grating that has n (8000) number of slits per centimeter. The resulting interference pattern is observed on a screen.
3. A light wave with a wavelength of λ (475 nm) is normally incident (i.e., hits at 90°) on a thin layer of oil (n = 1.46) on water (1.33).
4. Explain how polarized sunglasses increase visibility while driving (4 points).
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