The Electromagnetic Spectrum

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Presentation transcript:

The Electromagnetic Spectrum Contents: The Spectrum Basic Concepts Whiteboards

The electromagnetic spectrum TOC

Radio Waves Microwaves Infra-red Light, Ultra-violet X-rays Fight fight fight! Gamma Rays ….? Yeah! Go Physics!!!!!!

Basic Concepts v = f v = c = speed of light = 3.00 x 108 m/s f = frequency (Hz)  = wavelength (m) 1 nm = 1 x 10-9 m TOC

Electromagnetic Spectrum Whiteboards: Electromagnetic Spectrum 1 | 2 | 3 TOC

What is the wavelength of a 91.1 MHz radio wave? (2) v = f 1 MHz = 1 x 106 Hz  = v/f = (3.00 x 108 m/s)/(91.1 x 106 Hz) = 3.29 m W 3.29 m

What is the frequency of a 12.2 cm microwave? (ovens use this) v = f f = v/ = (3.00 x 108 m/s)/(.122 m) = 2.46 x 109 Hz W 2.46 x 109 Hz

What is the frequency of a 600. nm light wave? v = f 1 nm = 1 x 10-9 m f = v/ = (3.00 x 108 m/s)/(600. x 10-9 m) = 5.00 x 1014 Hz W 5.00 x 1014 Hz