optical telescope an astronomical telescope designed to collect and record light from cosmic sources
optimistic hopeful that the best will happen in the future
optical disc a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
optical illusion an optical phenomenon that results in a false or deceptive visual impression
astronomical telescope any telescope designed to collect and record electromagnetic radiation from cosmic sources
articulate express or state clearly
optical disk a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface
optical device a device for producing or controlling light
optical density (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation
optical glass clear homogeneous glass of known refractive index
radio telescope astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources
Newtonian telescope reflecting telescope in which the image is viewed through an eyepiece perpendicular to main axis
ophthalmoscope medical instrument for examining the retina of the eye
Schmidt telescope reflecting telescope that has plate that corrects for aberration so a wide area of sky can be photographed
coude telescope a reflecting telescope so constructed that the light is led to a plate holder or spectrograph
optical fusion the combining of images from the two eyes to form a single visual percept
optic disc the point where the optic nerve enters the retina
optical bench apparatus for observation and measurement of optical phenomena
optical lens a lens that focuses the image in a camera
spectroscope an optical instrument for spectrographic analysis