| optical | clear homogeneous glass of known refractive index |
|---|---|
| optical | an optical phenomenon that results in a false or deceptive visual impression |
| optical | an instrument designed to aid vision |
| optical | a lens that focuses the image in a camera |
| optical | (Light Amplification by Stimulated Emission of Radiation) optical device that produces an intense monochromatic beam of coherent light |
| optical | opacity to light |
| optical | a physical phenomenon related to or involving light |
| optical | optical device having a triangular shape and made of glass or quartz |
| optical | a pyrometer that uses the color of the light emitted by a hot object |
| optical | an astronomical telescope designed to collect and record light from cosmic sources |
| optical | in an optical manner |