Waves and Light.

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Waves and the Electromagnetic Spectrum

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Presentation transcript:

Waves and Light

Wave A DISTURBANCE that transfers ENERGY from place to place.

Mechanical Waves Requires a medium (solid, liquid, or gas) to move through Ex. Water wave, sound wave

Electromagnetic Waves Do NOT require a medium to move through. A vibrating electric and magnetic field that moves through space. Ex. Light, microwaves

Rest position

Wavelength-The distance between two corresponding parts of a wave (from crest to crest) Amplitude-Maximum distance that the medium particles move away from their rest positions. Crest-High point of a wave Trough-Low point of a wave

Frequency-number of complete waves that pass a given point in a certain amount of time ; measured in hertz (Hz); 1 wave every second = 1 Hz Speed- how far the wave travels in a given amount of time.

Producing EM waves Charged particles emit EM waves Charged particles creates an electric field Moving charged particles creates a magnetic field Screen captured from Doc Physics http://www.youtube.com/watch?v=IWVPJSoJDzA

http://www.youtube.com/watch?v=cfXzwh3KadE

Electromagnetic Spectrum EM waves are classified in order of increasing frequency. The shorter the wavelength the greater energy the wave has. The longer the wavelength the less energy the wave has. Radio Waves, Microwaves, Infrared waves, Visible light, Ultraviolet Rays, X-Rays, Gamma Rays

Electromagnetic Spectrum