Question

Unit of solid angle is
A) degree B) radian C) steradian D) radian second

Answer 1

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Steradian

A solid angle, ω, made up of all the lines from a closed curve meeting at a vertex, is defined by the surface area of a sphere subtended by the lines and by the radius of that sphere, as shown below. The dimensionless unit of solid angle is the steradian, with 4π steradians in a full sphere.

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Answer 2

Answer:

C) steradian

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