|
| |
3. Relationship between
Luminous Intensity and Illumination
illumination of the surface, 
but, 
so, 
 | This is known as the Inverse Square Law of
illumination. |
| In case the light falls on a surface at an incidence
angle of q as in Figure 4, then the illumination on the surface is given by: |
| This is known as the Lambert's Cosine Rule |
Figure 4 Proof of Lambert's
Cosine Rule
|
