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(a) Using the phenomenon of polarisation, show how transverse nature of light can be demonstrated. (b) Two polaroids P_1 and P_2 are placed with their pass axes perpendicular to each other. Unpolarised light of intesity I_0 is incident on P_1. A third polaroid P_3 is kept in between P_1 and P_2 such that its pass axis makes an angle of 30^@ with that of P_1. Determine the intensity of light transmitted through P_1, P_2 and P_3. |
Answer» SOLUTION : Intensity of LIGHT coming from `P_1 = (I_0)/2` Intensity of light coming from `P_2 = (I_0)/2 cos^2 30^@` `= (I_0)/2 ((SQRT3)/(2))^(2) = (3I_0)/(8)` Intensity of light coming from `P_3 = (3I_0)/8 cos^2 60^@` `= (3I_0)/(8) (1/2)^2= (3I_0)/(32)`. |
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