Physics Review Question Unit: waves Year: 1989 Question#: 46 Question: Which phenomenon must occur when two or more waves pass simultaneously through the same region in a medium. (1 ) refraction (2 ) interference (3 ) dispersion (4 ) reflection What is this question really asking? Explanation by: Jill S [ Return to question menu ] Answer 1 refraction INCORRECT Refraction is the wrong answer simply by the definition: the bending of the path of a ray when it passes obliquely from one medium to another of different optical density. return to top Answer 2 interference CORRECT Interference is when regions of constructive and destructive interference that are present in a medium as a result of the combination of two or more waves. Because of the definition of interference choice 2 is the correct answer. return to top Answer 3 dispersion INCORRECT Dispersion is the separation of polychromatic light into its individual colors. Because of the definition of dispersion it is not the correct answer. return to top Answer 4 reflection INCORRECT Because of the definition of reflection it is not the correct answer to the problem. Reflection is the act of throwing or bending back (light for example) from a surface. return to top What's this question really asking? What happens to two waves when they come together in the same place? return to top |
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