RFID The EM Spectrum.

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Presentation transcript:

RFID The EM Spectrum

Electromagnetic waves formed when an electric field (the blue arrows) couples with a magnetic field (the red arrows) magnetic and electric fields of an electromagnetic wave are perpendicular to each other and to the direction of the wave.

Properties of EM Waves Wavelength - m Frequency - Hz Energy - eV ElectronVolt: It is the amount of kinetic energy gained by a single unbound electron when it passes through an electrostatic potential difference of one volt, in vacuum. In other words, it is equal to one volt (1 volt = 1 joule per coulomb) times the charge of a single electron Freq = cycles per second

Properties of the EM Spectrum Typical Units Vary with the Spectrum

Observing the EM Spectrum?