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Rate | Answer | Clue |
BINOCULARS | Optical instrument | |
PROJECTOR | Optical instrument | |
MICROSCOPE | Optical instrument | |
PERISCOPE | Optical instrument | |
TELESCOPE | Optical instrument | |
CATOPTRON | A reflecting optical glass or instrument; a mirror. | |
FIELD | The space covered by an optical instrument at one view. | |
CHROMASCOPE | An instrument for showing the optical effects of color. | |
DIOPTRA | An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc. | |
OCULAR | The eyepiece of an optical instrument, as of a telescope or microscope. | |
DEFINITION | Distinctness or clearness, as of an image formed by an optical instrument; precision in detail. | |
GRAPHOSCOPE | An optical instrument for magnifying engravings, photographs, etc., usually having one large lens and two smaller ones. | |
STAUROSCOPE | An optical instrument used in determining the position of the planes of light-vibration in sections of crystals. | |
ERECTOR | An attachment to a microscope, telescope, or other optical instrument, for making the image erect instead of inverted. | |
PHANTASCOPE | An optical instrument or toy, resembling the phenakistoscope, and illustrating the same principle; -- called also phantasmascope. | |
THAUMATROPE | An optical instrument or toy for showing the presistence of an impression upon the eyes after the luminous object is withdrawn. | |
DEFINE | To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly; as, the defining power of an optical instrument. | |
APERTURE | The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. | |
EYEPIECE | The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed. | |
SPECTACLE | An optical instrument consisting of two lenses set in a light frame, and worn to assist sight, to obviate some defect in the organs of vision, or to shield the eyes from bright light. | |
SPECTROSCOPE | An optical instrument for forming and examining spectra (as that of solar light, or those produced by flames in which different substances are ... | |
PHONEIDOSCOPE | An instrument for studying the motions of sounding bodies by optical means. It consists of a tube across the end of which is stretched a film o... | |
POWER | The degree to which a lens, mirror, or any optical instrument, magnifies; in the telescope, and usually in the microscope, the number of times ... | |
PHANTASMAGORIA | An optical effect produced by a magic lantern. The figures are painted in transparent colors, and all the rest of the glass is opaque black. Th... | |
SEXTANT | ...ween objects, -- used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's q... |