Question

express relation of solid angle
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Answer 1

Answer:

Explanation:

Solid angle is defined as d omega as the ratio of the intercepted area(da) of the solid sphere described at the apex with o as the centre to the square of its radius r.

Answer 2

Answer:

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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