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MasteringPhysics-20

# MasteringPhysics-20 - MasteringPhysics Assignment Print...

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm... 1 of 16 11/18/07 7:30 PM [ Print View ] physics 2211 MP16: Chapter 20 Due at 5:30pm on Sunday, November 25, 2007 View Grading Details Wave Notation Learning Goal: To understand the relationships between the parameters that characterize a wave. It is of fundamental importance in many areas of physics to be able to deal with waves. This problem will lead you to understand the relationship of variables related to wave propagation: frequency, wavelength, velocity of propagation, and related variables. Note that these are kinematic variables that relate to the wave's propagation and do not depend on its amplitude. Part A Traveling waves propagate with a fixed speed usually denoted as (but sometimes ). The waves are called _______________ if their waveform repeats every time interval . ANSWER: periodic Periodic waves are characterized by a frequency that is designated by or . The quantities and are related to the length of the waves. The fundamental relationship among frequency, wavelength, and velocity is . This relationship may be visualized as follows: In 1 s, cycles of the wave move past an observer. In this same second the wavetrain moves a distance . Part B Solve this equation to find an expression for the wavelength . Express your answer in terms of the velocity and the frequency . ANSWER: = [ Print ]

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm... 3 of 16 11/18/07 7:30 PM ANSWER: = The units of are and indicate that angular wavenumber is a measure of the number of radians of phase in a unit distance, which is times the number of complete wave cycles in this distance. For example, a distance of one wavelength is equivalent to one cycle, one period, and . The angular wavenumber is often misnamed "wavenumber," which is actually , so be careful to determine how this term is defined when reading your textbook or reviewing your lecture notes.

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