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Usage. Length. Foot (unit) The foot is a unit for measuring length. It is one of the Imperial units and US customary units. The shortest way of writing the unit "foot" is by the abbreviation "ft" (or "ft."), or by a prime symbol ( ′ ). One foot contains 12 inches. This is equal to 30.48 centimeters.
Arc length is the distance between two points along a section of a curve. Determining the length of an irregular arc segment by approximating the arc segment as connected (straight) line segments is also called curve rectification .
a section of something that is long and narrow. “a length of timber” “a length of tubing” see more. noun. continuance in time. “he complained about the length of time required” synonyms: duration. see more. noun. the property of being the extent of something from beginning to end. “the editor limited the length of my article to 500 words” see more.
English: Length refers to the longest dimension of an object, or in certain contexts, a certain dimension of an object. Main category: Length. Contents. 1 Arc length. 2 Length measuring devices. 3 Units of length. 4 Orders of magnitude (length) Arc length [ edit] Main category: Arc length. arc-length approximation by multiple linear segments.
Optical path length. In optics, optical path length ( OPL, denoted Λ in equations), also known as optical length or optical distance, is the length that light needs to travel through a vacuum to create the same phase difference as it would have when traveling through a given medium. It is calculated by taking the product of the geometric ...
the measurement of something from end to end or along its longest side: in length The boat is ten metres in length. The length of the bay is approximately 200 miles. (along) the length of She planted rose bushes (along) the length of the fence (= the whole distance along it). [ C ] a piece of something such as string or pipe: a length of rope.
Beginning. Length of the day on other planets. Increasing day length on Earth. Related pages. References. Length of day. The length of the day is how long a day is. On Earth, a sidereal day is 23 hours and 56 minutes long, and a solar day is 24 hours. There are other planets with different types of day. Length of the day on other planets.
