Question

what is difference between radian and steradian??​

Answer 1

Radian. A unit of measure for angles. One radian is the angle made at the center of a circle by an arc whose length is equal to the radius of the circle. Steradian is a unit used for measuring solid angles, i.e 3D angles.

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Answer 2

Answer:

the SI unit of solid angle, equal to the angle at the centre of a sphere subtended by a part of the surface equal in area to the square of the radius.

WHILE RADIAN TAKES CARE OF AREA

Explanation: