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Q: Sextant is an instrument used in which of the following?
  • A. Gynaecology
  • B. Navigation
  • C. Birth control
  • D. Medical treatment
Correct Answer: Option B - The angular distances between two visible objects is measured with the help of sextant. Later on this measurement is used for purpose of navigation & surveying it is primarily used to measure angle between earth's horizon & astronomical objects. The theory of this instrument was formulated by Isaac Newton and discovered by John Hadley and Thomas Godfrey in about 1730.
B. The angular distances between two visible objects is measured with the help of sextant. Later on this measurement is used for purpose of navigation & surveying it is primarily used to measure angle between earth's horizon & astronomical objects. The theory of this instrument was formulated by Isaac Newton and discovered by John Hadley and Thomas Godfrey in about 1730.

Explanations:

The angular distances between two visible objects is measured with the help of sextant. Later on this measurement is used for purpose of navigation & surveying it is primarily used to measure angle between earth's horizon & astronomical objects. The theory of this instrument was formulated by Isaac Newton and discovered by John Hadley and Thomas Godfrey in about 1730.