summary14 - Summary Lecture 14 Waves Amplitude x Wavelength...

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Summary Lecture 14 Waves Amplitude x Wavelength Waves are periodic in space (wavelength) and time (Period T = 1/frequency Wave velocity v= and time (Period T = 1/frequency) Waves transport energy. Wave velocity v = f Transverse waves: Oscillation perpendicular to wave direction e.g. water waves, E.M. waves. Transverse waves can be polarized. Longitudinal waves Longitudinal waves: Oscillation parallel to wave direction e.g. sound waves
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Polarization A transverse wave is said to be (linearly) A transverse wave is said to be (linearly) polarized when its vibrations always occur along one direction. A polarized wave on a rope can pass through a slit that is parallel to the direction of the rope vibrations. The wave cannot pass through a slit that is perpendicular to the vibrations. An EM wave including light is polarized if the electric field of the wave fluctuates a long a single direction. Light (e.g. from a light bulb) consists of short bursts of EM waves emitted by many different atoms. The directions of the electric fields of these bursts are randomly oriented with respect to each other. This light is unpolarized.
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summary14 - Summary Lecture 14 Waves Amplitude x Wavelength...

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