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| Malus' Law |
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| If q is the angle between the plane of transmission of the analyzer and the polarizer, then intensity of the transmitted light I is |
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| where Io is intensity of light transmitted from polarizer. |
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| When unpolarised light is incident at polarizing angle ip on an interface separating air from a medium of refractive index m then, |
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| m = tan ip |
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| When the light is incident at polarizing angle ip, the reflected component along OB and refracted component along OC are mutually perpendicular to each other. |
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