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Unpolarised light is passed through a polaroid P_(1). When this polarised beam passes through another polaroid P_(2) and if the pass axis of P_(2) makes angle theta with the pass axis of P_(1), the write the expression for the polarised beam passing through P_(2). Draw a plot showing the variation of intensity when theta varies from 0 to 2pi. |
Answer» Solution : If the intensity of unpolarised light incident on POLAROID `P_(1)` be `I_(0)`, then intensity of light passing through the polaroid `P_(2)` is `I=(I_(0))/(2)cos^(2)theta`. A plot showing VARIATION of intensity I with `theta`, when `theta` VARIES from 0 to `2PI` is SHOWN in figure. |
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