Two polaroids `P_1` and `P_2` are placed with their pass axes perpendicular to each other.An unpolarised ligth of intensity `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 tranjsmitted throug `P_1,P_2` and `P_3`.

Two polaroids P_1 and P_2 are placed with their pass axees perpendiculat to each otehr.An unpolarised ligth of intensity 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 45^@ with tha tof P_1 .Dtermine the intensity of light transmitted through P_1,P_2 and P_3 .

Two polaroids P_1 adn P_2 are placed with their pass xes perpendicular to each other.An unpolarised ligth of intensity I_0 is incident on P_1 .a thid polaroid P_3 is kept in betwen P_1 and P_2 such that its axis makes an angle of 60^@ with that of P_1 .determine the intensity of light transited through P_1,P_2 and P_3 .

An unpolarised beam of light of intensity I_0 is incident on a combination of two polaroids.Find the net intesity of light of intensity transmitted by the combinatin,when the pass axis of the two polaroids are inclined to each other at an angle of 60^@ .

Two bulbs are rated (P_1, V) and (P_2, V) . If they are connected (i) in parallel across a supply of V find the power dissipated in the two combination in terms of P_1 and P_2 ?

Light from an ordianry source(say a sodium lamp) is passed through a polaroid sheet P_1 .The transmitted light is then made to pass through a second polaroid sheet P_2 ,which can be rotated so that the angle (theta) betwen the two polaroid sheets varies from 0^@ to 90^@ .Show graphically the variation of he intensity of light transmitted by P_1 and P_2 as a function of the angle theta .Take the incident beam intensity as I_0 . Why does the light from a cleear blue portion of the sky,show a rise and fall on intesnity,when viewed through a polaroid ,which is rotated?

Two bulbs are rated (P_1, V) and (P_2, V) . If they are connected (i) in series find the power dissipated in the two combination in terms of P_1 and P_2 ?

Light from a sodium lamp(S) passes through two Polaroid sheets P_1 and P_2 as shown in the figure. What will be the effect of the intensity of the light transmitted by P_1 and by P_2 on rotating Polaroid P_1 about the direction of propagation of light? justify your answer in both cases.

Two planes P_1 and P_2 pass through origin. Two lines L_1 and L_2 also passing through origin are such that L_1 lies on P_1 but not on P_2 , L_2 lies on P_2 but not on P_1 . A,B, C are there points other than origin, then prove that the permutation [A', B', C'] of [A, B, C] exists. Such that: A lies on L_1 , B lies on P_1 not on L_1 , C does not lie on P_1 .

In R^3 , consider the planes: P_1: y=0 and P_2:x+z=1 . Let P_3 be a plane, different from P_1 and P_2 , which passes through the intersection of P_1 and P_2 . If the distance of the point (0,1,0) from P_3 is 1 and the distance of a point (alpha, beta, gamma) from P_3 is 2, then which of the following relations is (are) true?