In physics and geometry, a material is isotropic if it has the same properties in all directions. This means that the material’s response to an electromagnetic field is the same regardless of how the material is rotated.
This has a few key implications:
- Permittivity and permeability are uniform in all directions.
- There is a single refractive index .
- The velocity of light is the same in all directions.
- Light doesn’t split into different beams when passing through the medium.