1. Light
There are two approaches to characterizing light: wave and quantum.
1.1 Wave approach
In the wave approach, light is considered to be composed of an electric field and a magnetic field , both perpendicular to each other and to the direction of light propagation, hence the term "electromagnetic radiation" (figure 1). Each of these fields behaves like a wave traveling at a speed which, in a vacuum, is called...
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Light
Polarized light
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