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# Title: [Physica, Id Est, Scientia Rerum Corporearum, In Decem Tractatus Distributa] Physica, Id Est, Scientia Rervm Corporearvm, In Decem Tractatvs Distribvta (shelfmarks Leibn. Marg. 7:1-2; ZEN Leibn. Marg. 7:1-2)
# Folio 449, page id 779785487:0507
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LIB. III. DB REFRACTIOHE, _C.
D E F I N LF1O I.
Refractio est radii, cum ex vno-
in aliud medium subit; incurnacio;
Elaec definirio clarissima est, nec
quidquam disticile habce.
DE F I N I Z1O FI.
Restexio est, radiis ab occursu
plani reditus, seu regressus:. II
Speculo huiulmodi redicum habes;
quomodocunque randem id Aac;
sive ab ipla prima Speculi superti-
cie radius regrediatur, sive post
aliquem Cemicircuirum, vel in-
curuationem, quod intra dehinie-
mus; led ve aliqui termini capian.
tur a eyronibus; canculum sche-
18. 24. maris Cubnecto; sic planum AC; SIC
radius incidens DB, angulus inci-
dentix ABD; radius retexuS BC;
angulus retexionis CBO, aequalis
Scilicet priori incidencia: Praecerea
SIEINEFa DlaMU AC, medium pet-
Spicuum densius; sic radius inci-
denria DB, angulus incidentia
ABD; radius productus BK; FC-
FractuS BI; angulus retractionis
IBK; angulus refractus IBFL; Per-
pendicularis BFI; linus anguli se-
Fracti MI; sinus anguli comple.
menti anguli incidencix RL: auE
Si vis SiE radius incidenciae IB; (IC.
que Lupra AC, medium rarius, ra-
dius productus erir quidem BE, sed
retractus erie BD, crirque fnus
anguli retracti DO, _ linus an-
e eo magis incurnatur, quo obli-
HI Y P OF H E515 L.
IIY POF H E S IS IL.
Radius e medio denso in rarum
recedat a perpendiculari; v. 8. IB.
oblique incidens, incurnatur ver-
in B.
TIY POFHFSIS TTT.
Radius in medium quodlibet per-
pendiculariter incidens nunquam in-
curnatur: Y. 9. FB recta cendic in
Radius e medio raro in densum
BII ieres praetara hyporheles cer-
tissimae Cune, e dere, quod lic,
dubium esse non porest; proptes
quid vero lic, demonstrabo intra,
ex meis principiis.
HIY POTHESIS IV.
Radius in idem medium, secun.
dum cumdem angulum incidens, sine
sus perpendiculum: v. 9, DB, in Bl;
Tom. LI.
quius incidic.
oblique incidens, ita incurnatur, 2E
suli complementi anguli inciden.
FIR, FII.
449
loncior sit. sine brenior; refringieur;
secundum cumdem anculum refra-
ctionis; De re quod lc, cerrisI-
mum est.
TIY BOF H E S 15 V.
Radius cadens in punctum super-
ficiei curnae, perinde se habet, atque
si in tancentem ejusdem puncti in-
cideret; e idem radius refractus in
denso potest dici incidens; si c raro
prodeat; v. 8. DB incidens AC re-
Fractus in BI; sed IB incidens, AC
refractus in BD; dere quod sIc,
cerrissimum est.
Le a 2e t au e
Non potest accto per meuam
quoalibet dissinat. iest raas sit
quo diffundieur sit determinatus:
Cerrum est ex l. 7. Mecaph. quip-
De omnis actio diffuliur dicic r2-
dium, omnis radius lineam decer.