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The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. [ 1] Originally, it was an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects – an optical telescope. Nowadays, the word "telescope" is defined as a wide range of ...
An illustration of some of the optical devices available for laboratory work in England in 1858. An optical instrument is a device that processes light waves (or photons ), either to enhance an image for viewing or to analyze and determine their characteristic properties. Common examples include periscopes, microscopes, telescopes, and cameras .
List of telescope types working outside the optical spectrum. Atmospheric Cherenkov telescope used to detect gamma rays. Infrared telescope. Radio telescope. Submillimeter telescope. Ultraviolet telescope (see also Ultraviolet astronomy) X-ray telescope (see also X-ray astronomy ) Wolter telescope.
A "Y" level. The telescope can be removed and reversed or rotated to remove errors. An autolevel. The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main ...
The key instrument of nearly all modern observational astronomy is the telescope. This serves the dual purposes of gathering more light so that very faint objects can be observed, and magnifying the image so that small and distant objects can be observed. Optical astronomy requires telescopes that use optical components of great precision.
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