Author Topic: Superposition of two impulses (Gaussian wave)  (Read 30117 times)

Fu-Kwun Hwang

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Superposition of two impulses (Gaussian wave)
« on: February 08, 2009, 12:34:29 am »
The following applet shows suposition of two impulses.

BLUE curve is the sum of two BLACK impulses, RED curve is the velocity distribution Vy(x).

First, click the checkbox paused to make the simulation paused when two impulses are very close to each other.
Notice that when the sum of two impulses is maximum, the velocity curve is a horizontal line.
This means that all the energy goes to potential energy and kinetic energy is zero.

If you click + checkbox, one of the impulse will be up side down.
And the sum of two impulses becomes a horizontal line.
It appears that those two wave cencel displacement completely, but check out the velocity distribution at that moment.

You can change the velocity and impulse width with slider,too.

-*-

2012/10/19 I have modified the code, so that user can drag the wave and change it's magnitude with mouse. Have fun and Try it! ;-)

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!

Fu-Kwun Hwang

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  • Hero Member
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  • Posts: 3062
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Re: Superposition of two impulses (Gaussian wave)
« Reply #1 on: October 19, 2012, 11:43:42 am »
Here is a simplify version (without velocity distribution).

Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
  • Please feel free to post your ideas about how to use the simulation for better teaching and learning.
  • Post questions to be asked to help students to think, to explore.
  • Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!