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