anguloC E G erit duplum lateris CE quod op-ponitur angulo CGE: cumquoqueCK& C E a:quales quia radii five femidiame-tri ejusdem cavitatis : igitur K G erit di-flantia fefquidiamctri ejusdem cavitatis ,five focus virtualis erit in G , undc vi pri-mx refradionis radius D E in cavo vitrorefra6i:us… … Sit •. r n i c^ Syntagma L Caput VL 59 Ic Lens plano-concava AB cnjus cavitatis/K /\ femidiameter H G iinea vera HK fit dupk ipfius HG five sequalis diametro. DiCo,fo-cum virtualem hujus Lentis efle in diftantia li-hcx HK ilve diametri cavitatis. Obvertac-enim primo Lens AB planam fuperliciem…
Optics, Geometrical · Optical instruments
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