What is law of malus ? two polaroids a and b are kept in cross position. a third polaroid c be placed between them such that intensity of polarized light transmitted from b reduces to 1/8th of the intensity of unpolarized light incident on a?
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The law stating that the intensity of a beam of plane-polarized light after passing through a rotatable polarizer varies as the square of the cosine of the angle through which the polarizer is rotated from the position that gives maximum intensity. Expand. Also called law of Malus, Malus cosine-squared law.
The third polaroid should be placed in such a way that it should bisect the angle b/w the two polaroids... it should be at an angle of 45* from polaroid A ... So intensity of light coming out of A= I/2 ....Then using Malus Law, After C= I/2* Cos2(theta) = I/2*Cos2(45*) = I/4...
After B= I/4 Cos2(45) = I/8 ...
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The third polaroid should be placed in such a way that it should bisect the angle b/w the two polaroids... it should be at an angle of 45* from polaroid A ... So intensity of light coming out of A= I/2 ....Then using Malus Law, After C= I/2* Cos2(theta) = I/2*Cos2(45*) = I/4...
After B= I/4 Cos2(45) = I/8 ...
Hope this will help you...Plz mark it as brainliest...
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