In the following images, light from a monochromatic point source, of wavelength 450 nm, is incident upon a slab of material whose index of refraction is 1.50, and thickness is 0.500 cm. Only a finite cone of rays from the source is allowed to strike the slab. Both sides of the slab are coated and have the same reflectivity 'R'.
![]() R = 0 |
![]() R = 15.0% |
![]() R = 30% |
![]() R = 45.0% |
![]() R = 60% |
![]() R = 75.0% |

Created
by Srihari Angaluri and Kiril Vidimce
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