A woman standing on a beach can just see the top of a lighthouse 25 km away. If her eye height above sea level is 1.65 m, determine the height of the lighthouse above sea level. Taking into account the effects of curvature and refraction.

Q: 60-Light of wavelength 620nm falls on a double slit system immersed in water. It may form an…

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Q: With modern technology, the index of refraction of a piece of glass can be varied linearly from the…

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Q: In a vertical photograph taken from an altitude of 2800 m, a chimney of height 100 m, appears at a…

A: Altitude (H): 2800 mChimney height (h): 100 mDistance of chimney image from principal point (r): 80…

Q: The observed altitude of B-ursae Minoris at lower and upper culminations are 29°58′15" and 60°453"…

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Q: 1.5 Deflection checks are crucial in engineering and construction? why discuss briefly

A: The objective of discussing the importance of deflection checks in engineering and construction is…

Q: The error of curvature and refraction of distance 1243.36 m, is: Answer: Choose... +

A: Given distance = 124.36m = 0.12436 Km

Q: A vertical photograph of a flat area having an average elevation of 250 metres above mean see level…

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Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.