Inquiring Minds

All About Light
All About Light Main Page  |  Classical  |  Relativistic  |  Quantum

Classical - What is Light?

What is Light?  |  Wave's Family Members  |  Electromagnetic Waves
How Do We Create Electromagnetic Waves?  |  Description of EM Waves
Spectrum of Electromagnetic Waves  |  Visible Spectrum
Speed of Light-First Try  |  Speed of Light in a Vacuum  |  Speed of Light in Matter
When Paul Dirac, the physicist who predicted the existence of antimatter, was asked what an electron is, he said:

"Electron, hmmm, Here, this is an electron," and he wrote

on the blackboard . "This function , this is an electron," Dirac added.

I answer the question of what light is in the same fashion,

In a non-quantum world, light is In a quantum world, light is

What do these equations mean? Please proceed to the next stop on your light tour.

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last modified 1/5/2001   email Fermilab