|Jun29-06, 03:07 AM||#1|
luminous intensity due to an isotropic point source of light
Does the luminous intensity due to an isotropic point source of light at a point on a surface depend on the angle it makes with the normal to the surface?
|Jun29-06, 07:51 AM||#2|
Your question is a bit confusing. If you mean the intensity as measured AT the point on the surface, then no, it does not depend on the angle it makes with the normal. In fact, if you removed the surface entirely, it would not change the intensity at that point. If you mean the intensity at some point off the circle due to the reflection of the light from the surface, then yes, it does depend on the angle as well as the angle the line from your eye makes with the surface. There will be two kinds of reflection: specular reflection, especially strong from a mirror or metal surface, that depends strongly on the angle, and diffuse reflection, more important if you have a "matte" surface that depends primarily on the type of surface but not the angle.
|Similar Threads for: luminous intensity due to an isotropic point source of light|
|Intensity From a Point Source||Introductory Physics Homework||3|
|Intensity of light at a point||Introductory Physics Homework||6|
|Point source of light beneath water.||Introductory Physics Homework||2|
|Luminous intensity in different directions||Introductory Physics Homework||4|
|Does light from a point source spread out?||Introductory Physics Homework||7|