Calculus 3: Triple Integrals (15 of 25) What is a Solid Angle?

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a solid angle (2-D angle in 3-D space) and how it's used in astronomy. Next video in this series can be seen at:    • Calculus 3: Triple Integrals (16 of 25) Wh...