Question

Consider the following statements: When plane polarized monochromatic light passes through an optically active substance,

(a). its plane of polarization rotates clockwise for all substances.

(b). its plane of polarization rotates anticlockwise for all substances.

(c). the angle of rotation of plane of polarization is proportional to the distance traveled inside the substance.

(d) the angle of rotation of plane of polarization is inversely proportional to the distance traveled inside the substance. 

Answer 1

Correct option (d) the angle of rotation of plane of polarization is inversely proportional to the distance traveled inside the substance. 

Explanation:

When a plane polarized light passes through an special type of substance along the optic axis the plane of polarization is rotated clockwise or anticlockwise depending on the nature of the substance. This special type of substance is called optically active substance and this phenomenon is known as optic activity.