- #1
jmc
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Homework Statement
For a sphere of radius r, find the solid angle Ω in steradians defined by spherical angles
of: a.) 0°≤θ≤ 20°, 0°≤ø≤360°;
Homework Equations
dA = r2 sin dθ dø (m2)
dΩ = dA / r2 = sin dθ dø (sr)
The Attempt at a Solution
I think I understand what a steradian (sr) is, on a sphere, and I need to find what ratio of a 4∏ is formed by the above limits, but I can't make the connection on how to form that ratio. ?