Isotropic

Question 1

How do isotropic and anisotropic minerals differ in regard to velocity and refractive index?

Answer 1

Isotropic minerals have the same refractive index and velocity of light in all directions.

Question 2

Is the direction of polarization affected in PPL?

Answer 2

Anisotropic: Yes
Isotropic: No

Question 3

Key features of an isotropic indicatrix:

Answer 3

• Spherical shape
• na and nb are all the same= all the same length and directions