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 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)


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 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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