Polarization
 

Polarization problem 20


A beam of vertically polarised monochromatic light is incident on a polarising filter, as shown in the figure below




The transmission axis of the filter is initially vertical and the transmitted light beam has the same intensity as the incident light beam. The filter may be rotated about the direction of the light beam to change the angle of the transmission axis to the vertical.


  • State one angle of the transmission axis to the vertical that results in no transmitted light beam.


  • The filter is now positioned with its transmission axis at angle to the vertical, as shown in the second figure blow.




    The ratio is equal to .


    • Calculate angle


    • Calculate the ratio


 

main author and content editor: Noble Menedi Firima