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Physics Facts

Coming In Strong On Your AM Dial

The AM radio dial would be nothing but chaos and noise without a very basic rule - turn down the power at night. The Federal Communications Commission (FCC) controls and regulates the airwaves in the ... Continue reading

AM Wave Deflection

The Equivalence Principle

Four hundred years ago--or so the story goes--Galileo Galilei started dropping things off the Leaning Tower of Pisa: Cannon balls, musket balls, gold, silver and wood. He might have expected the ... Continue reading

Single Molecule Electroluminescence

Incandescence and luminescence are two main ways of producing light. In incandescence, electric current is passed through a conductor (filament of a light bulb for example). The resistance to the ... Continue reading

(A) Silver oxide film exposed to DC current; (B) activated regions emitting light when conected to AC current; (C) zoom shows single molecule electroluminescence

What Is Radiofrequency Energy (Rf)?

Radiofrequency (RF) energy is another name for radio waves. It is one form of electromagnetic energy that makes up the electromagnetic spectrum. Some of the other forms of energy in the ... Continue reading