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3 polarization and brewsters angle light is composed

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Unformatted text preview: to a material with index of refraction nr it will bend to a new angle θr according to the equation: ni sin θi = nr sin θr (2) 2.3 Polarization and Brewster’s Angle Light is composed of transverse electromagnetic waves produced by vibrating charges. These waves consist of electric and magnetic fields oscillating in the plane perpendicular to the direction of propagation. The polarization of light describes the direction of the electric field in this plane. When the electric field is oscillating in random directions the light is said to be unpolarized, while if the electric field is only oscillating in one direction the light is called linearly polarized. If we look at the horizontal and vertical components of the electric field in unpolarized light, we will find that, on average, it does half of its oscillating in the horizontal direction and half in the vertical direction. By shining light through a linear polarizer we block out the oscillations in one direction, leaving the light linearly polarized. We will use this effect to investigate some interesting phenomena involving polarizers and polarization. If we polarize lig...
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This document was uploaded on 02/15/2014.

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