Author: Ibrahim
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What are External focusing telescope
Binoculars in which focusing is achieved either by external movement of the objective glass or the eyepiece are known as external focusing binoculars. In an external focusing telescope, the body consists of two tubes with the objective and the eyepiece mounted on the ends. One tube is made to slide axially inside the other by…
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What is Telescope
A telescope is an optical instrument for magnifying and viewing images of distant objects. The telescope of a leveling instrument is a metal tube with an eyepiece at one end and a mirror at the other end. Telescopes, which are mounted in surfaces, are generally of two types. External focusing telescopeInternal focusing telescopeExternal focusing telescopes…
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What are major parts of Levelling instrument
The surface presents a horizontal line of sight. The surface consists of the following main parts. A telescope to provide line of sightA level tube to make the line of sight horizontalA leveling head to bring the bubble into the center of the runA tripod to support the device.
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What is Purpose of levelling
To find the elevations of given points with respect to a given or assumed datum (a datum is an arbitrarily assumed surface level to which elevations are referenced).Establishing points at a given elevation with respect to a given or assumed datum.The following are the instruments used in leveling: A surfaceA leveling staffA measuring tape