Question

A beam of light passes through a polarizer and then

ananalyzer. In this process, the intensity of the lighttransmitted
is reduced to 10% of the intensity incident on theanalyzer. What is
the angle between the axes of the polarizerand the analyzer?

Answer 1

Angle between the polarizer and analyzer will be 18.43°

Step-by-step explanation:

Let the original intensity of light is
`I_0`

It is given that when light is passed through through a polarizer its intenity is decreased by 10 %

So after polarization new intensity of light
`I=I_0-0.1I_0=0.9I_0`

We know that when light is passed through a polarizer its intensity is given by

`I=I_0cos^2\Theta`

`0.9I_0=I_0cos^2\Theta`

`cos^2\Theta =0.9`

`cos\Theta =0.9486`

`\Theta =18.43`

So angle between the polarizer and analyzer will be 18.43°