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

Table of figures

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8062 NR, RX; & incidentinm AN, AR, AX reflexi GN, HR, IX
11Fig. 85. axi occurrant producti punctis K, L, M;
erit intervallum ML ab
obliquiorum
occurſibus concluſum majus ipſo LK rectiorum occurſi-
bus
intercepto.
Nam quoniam eſt ANq + AXq & gt; 2 ARq. erit 2 ACq
-
ANq - AXq &
lt; 2 ACq - 2 ARq. adeóque ACq -
-
AXq.
ACq - ARq & lt; ACq - ARq. ACq - ANq.
hoc eſt, è præmonſtratis, CL. CM & lt; CK. CL; vel inversè
CM
.
CL & gt; CL. CK. quapropter erit CM + CK. & gt; 2 CL.
&
ideò CM - CL & gt; CL - CK hoc eſt ML & gt; LK :
Q
E.
D.

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