Optics

1 Optics




Properties of Light


Light behaves both as waves and as particles (photons)


Its speed (velocity) (v) is directly proportional to wavelength (λ) and frequency (ν): v = λν





Its energy is directly proportional to frequency and inversely proportional to wavelength: E =  = h(c/λ)


















Prisms


Prisms displace and deviate light (because their surfaces are nonparallel); light rays are deviated toward the base; image is displaced toward the apex (Figure 1-3)
















Vergence


The amount of spreading of a bundle of light rays (wavefront) emerging from a point source


Direction of light travel must be specified (by convention, left to right)












Lenses

















Aberrations


Lenses behave ideally only near optical axis; peripheral to this paraxial region, aberrations occur








Jun 4, 2016 | Posted by in OPHTHALMOLOGY | Comments Off on Optics
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