Question

What is the formula for solid and plane angle ?

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Answer 1

Answer:

The units of the radian and the steradian can be determined by fixing the exact values of the total plane Φ and solid Ω angles: the radian is defined on the condition that the total plane angle is equal to Φ=2π rad, the steradian is defined on the condition that the total solid angle is equal to Ω=4π sr.

Explanation:

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