Electromagnetic Radiation

From Physics Book
Revision as of 15:21, 18 April 2016 by Caturof (talk | contribs)
Jump to navigation Jump to search

Claimed by Carlos Fernandez to edit (Spring 2016)

Electromagnetic Radiation

The four Maxwell's Equations provide a complete description of possible spatial patterns of electric and magnetic field in space.

The Main Idea

If a charge is moved sinusoidally it will emit continuous radiation.

A Mathematical Model

The position of the particle is defined by a sine wave:

y = ymaxsin(wt)

        Where w is the angular frequency.

Amplitude

The Amplitude of the sinusoidal Wave is the height of the peak in the wave measured from the zero line.

Period

The period of the wave is the time between crests.

T = 2pi/w-----(units of seconds)

Frequency

f = 1/T f = w/2pi----(Units Hertz)

Wavelength

The distance between crests in meters. Wavelength is equal to the speed of light times frequency.

ENERGY FLUX

Is defined by the following equation:

        S = (1/u0)*(E x B) in W/m^2