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COMBUSTION FROM AFAR
REVERSIBILITY AND IRREVERSIBILITY IN OPTICS
3 other sections not shown
aberration absorption angular aperture angle astronomers axis brightness calculated central spot combustion concentration cylindrical determined diameter diatom diffraction pattern dimensions direction distribution effect electron microscope element emitted entrance pupil equal equation example exit pupil eyepiece factor field of vision focal distance focal plane Fresnel geometric optics glass greater Hence Huygens principle Huygens-Fresnel principle illumination impinges incident increase infinitely intensity inventors irreversibility layers least resoluble lens lenses Let us assume light source luminous energy luminous flux magnification means method mirrors numerical aperture objective observed obtained optical instruments optical system parallel beam perpendicular photograph point source possible pover principle problem produced propagated radiation reduced reflection refractive index relative aperture resolving power result retina reversibility rings scatter screen shell slits solid angle source of light spectra star stilbs structure telescopic systems theory vector vibrations visible vith wavelength X-ray microscopes x-rays