optics

noun4

1. •
   The physics of light and vision: basic optical science.
2. •
   Technology that makes use of such physics: applied optical science; business lines making use of such technology.
3. •
   (figurative) Perception, image, public relations, especially in politics.

   • His policy prescription was sound, but the optics were horrible.
4. •
   The light-related aspects of a device.

   • the optics of liquid crystals under certain laboratory conditions
   • The optics of this telescope are particularly good.