In optics, Lambert`s cosine law says that the radiant intensity or luminous intensity observed from an ideal diffusely reflecting surface or ideal diffuse radiator is directly proportional to the cosine of the angle θ between the observer`s line of sight and the surface normal. The law is also known as the cosine emission law or Lambert`s emis......
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http://en.wikipedia.org/wiki/Lambert`s_cosine_law
the statement that the radiance of certain idealised surfaces is independent of the angle from which the surface is viewed NOTE - The radiant intensity of such a surface is a maximum normal to the surface and decreases in proportion to the cosine of the angle from the normal.
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=731-01-37
for a surface element whose radiance or luminance is the same in all directions of the hemisphere above the surface: I(?) = I
n cos ? where I(?) and I
n are the radiant or luminous intensities of the surface element in a direction at an angle ? from the normal to the surface and in...
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-04-56
No exact match found.
