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Physics Facts

Ultraviolet Light

Ultraviolet light is a form of radiation which is not visible to the human eye. It's in an invisible part of the 'electromagnetic spectrum'. Radiated energy, or radiation, is given off by many ... Continue reading

Images from the EIT (Extreme-ultraviolet Imaging Telescope) instrument on the SOHO spacecraft.

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

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

How Lasers Work

Light is a fascinating thing. Or things, as the case may be. Electromagnetic energy that our eyes have developed to see, light has the same behavior and properties as all other electromagnetic ... Continue reading

Lasers are really useful tools for making measurements.