Transmission-Refraction Medium 1 Medium 2 n Recall snell's law Incident ray n, sin b,=n sin e Refracted ray Light Intensity S Ar vetz C Dispersion if index of refraction is wavelength dependent n(n) Refractive devices not popular in space imaging since we need different lenses for uV. visual and ir Chart: 6 February 13, 2001 16.684 Space Systems Product Development MIT Space Systems LaboratoryTransmission-Refraction Medium 1 Medium 2 n1 n 2 Recall Snell’s Law n1 sin T n 2 Incident ray 1 2 sin T Refracted Ray H E 2 Light Intensity S c 4S Dispersion if index of refraction is wavelength dependent n( O ) Refractive devices not popular in space imaging , since we need different lenses for UV, visual and IR. Chart: 6 16.684 Space Systems Product Development MIT Space Systems Laboratory February 13, 2001