# NTNUJAVA Virtual Physics LaboratoryEnjoy the fun of physics with simulations! Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

## Information about this web site => Request for physics Simulations => Topic started by: peacenlove on November 19, 2009, 07:18:53 am

 Title: request for applet2 Post by: peacenlove on November 19, 2009, 07:18:53 am hi again an new question :( :)is it possible to calculate opposite phase or ? of any given frequencyand will that opposite phase fequency cancell the sound of its originalsorry i bet these sound (scuse the pun) like stupid questionss Title: Re: request for applet2 Post by: peacenlove on November 19, 2009, 07:48:05 am i found this  The movie at left shows how a standing wave may be created from two travelling waves. If two sinusoidal waves having the same frequency (wavelength) and the same amplitude are travelling in opposite directions in the same medium then, using superposition, the net displacement of the medium is the sum of the two waves. As the movie shows, when the two waves are 180° out-of-phase with each other they cancel, and when they are in-phase with each other they add together. As the two waves pass through each other, the net result alternates between zero and some maximum amplitude. However, this pattern simply oscillates; it does not travel to the right or the left. I have placed two dots on the string, one at an antinode and one at a node.  http://paws.kettering.edu/~drussell/Demos/superposition/superposition.htmlis it possible to make an applet showing this with a frequency and opposite phase calculatorsine wave within normal hearing range Title: Re: request for applet2 Post by: peacenlove on November 19, 2009, 08:49:49 am (100 Hz – 11000 Hz). Title: Re: request for applet2 Post by: Fu-Kwun Hwang on November 19, 2009, 12:28:28 pm Please check out Superposition of two waves (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=752.0) or Suposition of Two Waves (with different phases) (http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=829.0) Title: Re: request for applet2 Post by: peacenlove on November 20, 2009, 03:53:12 am thanks so much :)