i ,m i i 32 TundaTTienttdm Ih Mathematico^Dloptricum H^cpropofidoabaliisvaWe Gbfcure & intricate , itaut ciiificulterin-telligf queat,demonftratur. Ego pro captu cujuslibet facjlius ita de-mcnftro. Sit Lens utrinqucfmiiitcrconvexa A C B, in quamincidatradius DEaxi FC parallelus. Dico,… … H I< Dcmonftratio. Radius incidens D E vi prim^refradionis invitro dirigitur abE in oK per corollar.^.hujus. Ducatur jam ad pun- dum O egreflus e vitro in aercm perpendicu- laris LOF, entqueincidenti^r in vitro angu- lus EOF, & per i^.primi Euclid. asqualis illi L O Vi Defcnbatur jam ex…
Optics, Geometrical · Optical instruments
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