Physics II Lab w answers_Part_73

Physics II Lab w answers_Part_73 - Experiment 25...

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157 Experiment 25 Polarization of light Apparatus Laser source, polarizer, analyzer, photodiode, battery, multimeter, glass slab, optical table and stand. Objective To study the polarization of light, to verify Malus law and to find the Brewster angle for glass. Theory There are a number of ways an unpolarised light can be converted into a plane polarized light. You are given two polarising sheets (polaroids). The light passing out of a polarizer is linearly polarized with the electric field E fixed in one direction in space as determined by the orientation of the polarizing sheet. If this light passes through a second polarizer (analyser), then the light output depends on the relative orientation of the two polarizers. If the pass plane of the second polarizer is making an angle θ with respect to the electric field E, then the magnitude of the field in the output wave is cos θ and the output intensity is proportional to cos 2 θ Thus the output intensity I of the light transmitted by
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Physics II Lab w answers_Part_73 - Experiment 25...

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