what is the unit of plane and solid angles??
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The dimensionless unit of plane angle is the radian, with 2π radians in a full circle. 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.
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The dimensionless unit of plane angle is the radian, with 2π radians in a full circle. 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.
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