S. L. Arora Solutions for Chapter: Wave Optics, Exercise 8: Problems For Practice

If the angle between the pass axis of polarizer and the analyser is $45°,$ write the ratio of the intensities of original light and the transmitted light after passing through the analyser.

A polariser and an analyser are oriented so that the maximum light is transmitted. What is the fraction of maximum light transmitted when analyser is rotated through

$30°$ 

Two polaroids, $P_1$ and $P_2$, are 'set-up' so that their 'pass-axes' are 'crossed' with respect to each other.  A: third polaroid, $P_3$, is now introduced between these two so that its 'pass-axis' makes an angle $\theta$ with the 'pass-axis' of $P_1.$ A beam of unpolarised light, of intensity $I$, is incident on $P_1$. If the intensity of light, that gets transmitted through this combination of three polaroids, is $I^{\text{'}}$, find the ratio $\left(\frac{I^{\text{'}}}{I}\right)$ when $\theta$ equal$30°$

Two polaroids are crossed to each other. If one of them is rotated through $60°,$ then what percentage of the incident unpolarised light will be transmitted by the polaroids? 

Four polaroids are so placed that the transmission axis of each is inclined at an angle of $30°$ from the axis of the previous polaroid in the same direction. If unpolarised light-beam of intensity $I_0$ falls on the first polaroid, then intensity of the light emerging from the last polaroid is $n\times I_0$. Value of $n$ upto two digit is