lecture23-shock and standing waves-0

lecture23-shock and standing waves-0 - What you will be...

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What you will be able to do a/er today … the diference between the Doppler efect For light as compared to the situa;on For mechanical waves how two iden;cal waves moving in opposite direc;ons can For a standing wave (superposi;on) Explain … wavelength and Frequency oF a standing wave Calculate … boundary condi;ons to a standing wave Apply …

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2 Doppler Effect observer will notice a change in the wavelength (the distance the wave is traveling has changed) the wave will pass an observer more or less frequently, depending if the observer is in front of or behind the source The wave speed does NOT change if the source is moving hears hears wave fronts wave fronts Time between two wave crests = period T = 1/f= λ /v. If in time T, the source moves d s = v s T, then a stationary
You have a summer job on a ship, the captain of the ship estimates that about 6 km ahead of the ship is an outcropping of land and asks you to use the sonar to check how fast the ship is approaching it. The ship's instruments tell you the ship is moving through still water at a speed of 31 km/hr but the captain cannot take any chances. A sonar signal is sent out with a frequency of 980 Hz, bounces off the underwater obstacle, and is detected on the ship. If the ship's speed indicator is correct, what frequency should you detect?

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This note was uploaded on 01/15/2012 for the course PHYS 101 taught by Professor Bates during the Winter '08 term at UBC.

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lecture23-shock and standing waves-0 - What you will be...

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