1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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/cone

  1. Dec 21, 2011 #1
    Hi everyone

    I'd like to compute the solide angle defined by a cone whose angle θ is known.
    I tried with the definition but I probably mistook since it lead me to compute an integral worth...0.
    I then tried with a rule of three, but the result I get is clearly wrong too.

    Could you explain me how to proceed?
     
  2. jcsd
  3. Dec 21, 2011 #2
    Try this:
    [itex]\int_0^{2\pi}\,\int_0^\theta\,sin\theta\,\mathrm{d}\theta\,\mathrm{d}\phi[/itex]

    for a cone with apex angle 2theta

    via wikipedia
     
  4. Dec 22, 2011 #3
    Thank you emgram769: In fact that's almost what I tried to do but I took the second integral with -theta instead of 0 (and we should take 0 because phi is integrated over 2Pi)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Solid angle/cone
  1. Solid Angle (Replies: 2)

Loading...