Polarization by Scattering and Reflection

Polarization by Scattering and Reflection - for E in the...

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Polarization by Scattering and Reflection Scattering occurs when an incident light wave causes a dipole to vibrate in the direction parallel to the electric field. The dipole does not radiate in the direction in which it is oscillating. Figure %: Polarization due to scattering. Unpolarized light can be though of as the sum of two perpendicular, linearly polarized waves. This means that for unpolarized incident light, the radiated light will become partially polarized in the directions perpendicular to the direction of propagation, as shown.
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Reflection from dielectric surfaces also causes polarization. For electric fields polarized perpendicular to the plane of incidence (the plane of the incoming ray) the reflected and transmitted waves must also be polarized in the same direction as the incident wave. However,
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Unformatted text preview: for E in the plane of incidence the electron-oscillators on the surface of the dielectric will vibrate under the influence of the refracted wave. However, shows the angle between the reflected wave and the dipole axis (the direction of oscillation) is now small and thus very little light will be reflected in this direction. Figure %: Polarization by reflection. If the angle with the dipole axis is made to be θ = 0 o , then the reflected wave vanishes. This angle is called Brewster's angle and is given by: tan θ p = For unpolarized light incident on the surface at Brewster's angle, the reflected light is polarized perpendicular to the incident plane, or parallel to the surface. At other angles, the reflected light will be partially polarized....
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This note was uploaded on 02/09/2012 for the course PHY PHY2053 taught by Professor Davidjudd during the Fall '10 term at Broward College.

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Polarization by Scattering and Reflection - for E in the...

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