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Related articles:
Magnification
F-number
Aperture
Optical disc
Wavelength
Key terms: math numerical aperture lens na theta sin fiber optics beam frac mathrm angle light defined object related cone working laser beam distance microscopy approximation refractive index magnification irradiance acceptance angle ray exit apertura focal definition typically gaussian laser physics cone of light sqrt spread marginal axis core photography spot plane ratio photographic multimode exact cos pupil lenses Search external links cited by footnotes on Wikipedia page Numerical aperture: |
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