Question

Discuss polarisation by selective absorption.

Answer 1

1. Selective absorption is the property of a material which transmits waves whose electric fields vibrate in a plane parallel to a certain direction of orientation and absorbs all other waves.
2. The polaroids or polarisers are thin commercial sheets which make use of the property of selective absorption to produce an intense beam of plane polarised light.
3. Selective absorption is also called as dichroism.