Barrow, Isaac, Lectiones opticae & geometricae : in quibus phaenomenon opticorum genuinae rationes investigantur, ac exponuntur: et generalia curvarum linearum symptomata declarantur

Table of contents

< >
< >
page |< < (63) of 393 > >|

Lect. VIII.

I. Hæcadſumimus. Si duæ lineæ ( OMO, TMT ) ſeſe con-
Fig. 76,
77.
tingant, angulosipſæ comprehendunt ( OMT ) rectilineo quovis an-
gulo minores.
Et vice versâ: Si duæ lineæ ( OMO. TMT ) an-
gulos contineant quovis rectilineo minores, illæ ſeſe contingent _(_con-
tingentibus ſaltem æquipollebunt_)_.
Hujus _effati_ rationem jampridem _(_ni fallor_)_ attigimus.
Nam quoniam lineæ OMO, PM P ſeſe contingunt, erit angulus
OM P quovis _rectilineo_ minor.
Item, ob linearum TMT, PMP
_contractum_, erit _angulus_ TM P quovis etiam _rectilineo_ minor.
Erit
igitur angulus TMO _rectilineo_ quovis minor.
Unde lineæ OMO,
TMT ſe mutuo contingent.

Text layer

  • Dictionary

Text normalization

  • Original

Search


  • Exact
  • All forms
  • Fulltext index
  • Morphological index