August 1, 2008 Issue

Physics To Go 54 - String & electron waves

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Physics in Your World

Hyperphysics: Standing Waves image
image credit: Andrew Davidhazy; image source; larger image

Hyperphysics: Standing Waves

The photo, by Andrew Davidhazy from the Rochester Institute of Technology, shows a vibrating string with a weight hanging from the lower end. For more details, see String Vibrations. To learn about standing waves on strings and in air, visit Hyperphysics: Standing Waves.

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Physics at Home

Wave on a String

In the PhET applet, Wave on a String, you can drag the end of the string up and down to simulate wave motion. To learn more, visit Physic 2000's Standing Waves and Resonance.


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From Physics Research

STM Gallery image
image credit: R.J. Celotta, S. Balakirsky, J.A. Stroscio/NIST; image source; larger image

STM Gallery

This image, from the National Institute of Standards and Technology (NIST), shows a scanning tunneling microscope (STM) image of electron waves in a "corral" that was created on the crystal surface. To find out how how these are made, visit The Scanning Tunneling Microscope.  For an artistic gallery of similar images, see IBM: STM Gallery.


Worth a Look

Standing Waves: Harmonics and Patterns

To find out how two running waves in a tube add up to a standing wave, visit the Physlet applet Standing Waves: A Tube Closed at Both Ends. For a related video, see Standing Wave Movie. For a tutorial on standing waves, with animations, visit Standing Waves:  Harmonics and Patterns.


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