3.3 EM Waves

3.3 EM Waves - Polarization of light EM Waves 3.3...

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1 EM Waves 3.3 Polarization of light Momentum of light Polarization of light • Light is a transverse wave. • The E field vector can be polarized in either of two perpendicular orientation. • Unpolarized light is a random mixture of two polarizations. The E field fluctuates between different polarization. • Light may be polarized by physical processes such as absorption, reflection or scattering. • Polarization of light can be used for electo- optical displays (e.g. liquid crystal displays). Polarization • Light can be polarized with E fields along two perpendicular orientations. • We can consider light to be a mixture of waves with two perpendicular polarizations. Unpolarized light Light from a light bulb is unpolarized The electric fields arise from independent random oscillator with different orientations in space. Polarized and un-polarized light Unpolarized Light has E field at any instant can have E in any direction.
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3.3 EM Waves - Polarization of light EM Waves 3.3...

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