Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solid angle and plane

  1. Dec 23, 2013 #1

    I known an infinitesimal relation between the solid angle Ω with the azimutal angle θ and zenital φ, that's given by d²Ω = sin(φ) dφ dθ. But this is infinitesimal relation, exist other relation non infinitesimal between the solind angle with the plane angles? Thanks!
  2. jcsd
  3. Dec 23, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hello Jhenrique! :smile:

    Solid angle is the same as area (on a unit sphere), for which there are standard formulas.

    In particular, if you know all three angles of a triangle, the area is their sum minus π.

    (i don't remember the other formulas, but a quick google search will find them :wink:)
  4. Dec 23, 2013 #3
    I found nothing more. I thought if an area can have 2 definitions A = xy and dA = dxdy, then the solid angle could have 2 definitions too, 1 algebric definition and 1 infinitesimal definition...
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Solid angle and plane
  1. Solid Geometry (Replies: 2)

  2. Platonic Solids (Replies: 2)