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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 102, page id 779785487:0160
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E18. 13
102
PHZSLCAE TR ACF. IPI.
Fertio, Ita porest collocari ob-
rectum, ve radios perpendiculares
in prismaris planum inBIMILEAT; EMNC
aurem radii nullo modo emergune,
ex secundo plano, in quodincidunt;
v. 8. Cc Prilma, veleriangulU EFS,
Sic obiectum in B; ducacur radius
BD, perpendicularis in primum pla-
num Fl, cerre rectâ delcendie in C;
admoneatur oculus in quolibce
puncto secundi plani FS, nullo mon
do videcur obiectum B; vnde ne-
cellario collivo, radium BDC
nullo modo emergere ex lccundo
Planio F5, dere, quod lic, cerrum
elt; ac vero proprer quid sic, nemi-
nem legi, qui diceret; ratio Tamen
clara elt, quia cum radius incidei-
ria sic ralde obliguus, est enim
D CF criginca orad. producatur
DO in R, angulus SOK est eriam
30. Srad. igicur cum retractio tie-
si debeat à perpendiculari, cerre
angulus retractionismaior esle de-
bec anguloS CR; igitur eadius
retractus incra virrum qualiregre-
ditur, v. 8. in GI, igirur oculus
Policus in R obiectum ridebie, ve
dicam paulo post: sed dehis agc-
muS IraC. 4.
Ouarco; Flinc nonnullosreiicies,
qui rolunt, ab ipla rltima Cuperti-
cic, tadium reflecti; tam enim ce-
Aectererur viius, quam alius: prxe-
cerea vlcima Cuperhcios FS, Cst FAn-
cum vltima terminario corporis,
quae cum addac cancum negatio-
nem, ve luo loco dictum est, mini-
ie reflectere porelt; porro alia est
tatiopeo ampulla, aqua plena, vi-
erum enim, quod aquam conten-
cam rerminat reflectere porelt:hinc
etiam rejicies nonnullos, qui vo-
Iune, ab aereradium refecti; quod
revera heri non porest, aci eni
liberam craiectionem relinquies
aliognin eriam aliosreflecteret mi-
nus oblique cadentes: igirur hr-
tus effectus alia ratio non cst, pEX-
cer eam, quam supra expolui-
IMIIS.
Ouinco, Alii existimant cadios
omnes, in ciiculum isc, nOn VecO
in lineam rectam; quod cerre re-
EIII eCE, in retlexione, VEEraCL. 4.
Fuse demonstrabimus; ac vero. in
refractione, manifeltum experi-
mentum sencentiam hanc manise-
Atae Falliratis connincie, re vide-
musin vicreo vase, vel rectilincis
cerminaro, vel curuilineis; nempe
radius fractus recta via progredi-
cui; igieur in retractione simplici,
hos radios in circulum fractos p0..
nere necesse non es; praelerrim
cumnulla rario huiulirodi inCUE-
vacionis exeosirari posit; dico in
retractione simplici, nam refexio
est fractionum quali lemicirculus,
vetract. 4. ORendemus.
Sexto. Hlinc li radii cadant per-
pendicularicer in primum planum
prilinaris, obiectum in duobus lo-
cis videbitur; sic enim prilia FFS;
sc obiectum in B, SIE radius B D
productus in DC, cum in GITK;
Oculus politus in R, videbit obie-
ctum; lic alius cadius BFI, produ-
CtuS In FIP, cum in PP, OculuS PO-
Stus in T, videbic eriam obiectum;
dixi si radii cadane perpendiculari-
Ter, vel quali perpendiculariter,
nempe cum primum planum inci-
denrix obrenditur obiecto, licet
ab eodem obiecti puncto, dux. Per-
pendiculares in idem planum mini-
ine cadere polline, quia tamen an-
suliincidentix proxime accedune
ad rectum, pro recto phylice acci-
pi pocest; praeserrim cum incl2
prilima