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  Recreate Physics History: Build a Voltaic Pile

  In the late 1700s, Italian scientist Luigi Galvani stumbled across one of the most important discoveries of all time. He found that frog legs would contract when some of the muscles and nerves were connected – even when the frog was dead! Galvani attributed this phenomenon to the idea that animal and human brains produce [...]

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  The Electricity & Magnetism Light Bulb Demo Will Light Up Minds

  The link between electricity and magnetism finds its legendary roots back to Hans Christian Orsted when he supposedly found that electric current affected his compasses during a student lecture. That piece of scientific history may be one of exaggerated legend, but the marriage of electricity with magnetism has been widely known for over a century, later to be given a full mathematical explanation by Lord Kelvin and James Clerk Maxwell. The concept of electron movement causing the production of an ensuing magnetic field is a fundamental model used in describing electromagnets, generators, transformers and electric motors.
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  Big Standing Wave - Small Effort!

  In the video clip, you see the Super Springy stretched out a distance of 24 feet. By adjusting the frequency of the waves, the wavelength may be manipulated so that different numbers of loops can be formed.  As with all standing waves, the length of one loop is one-half wavelength. You can find the wavelength (λ) of the standing wave by dividing its total length by the number of loops to get the length of one loop, and then doubling it.

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