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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 86, page id 1677894601:0262
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=262
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C86
medium in Anoles of refraction equat to their Inoles of
reftexion.
For wrten Licht is reflected by the second lurtace ot
thinplates, it soes out afterrards Freely at the Arst sur-
tace to makre the Rings oF Colours wrhich appear by
rellexion, and by the frcedom ofits egrels, mâkes the
Colours oF these Rings more ririd and Crons thanthole
irhich appear on. the other sde oF the Plates by the
transmitted Light. Pherefected rassare theretore in
Ats oF casy transmission at their egress; irtrich would
not alirars happen, it the intervals ot the Aes within
the plate alter rettexion irere not equal both in lensth
andnumber totheir intervals beforeit. And this contrrms
allo theproportions let donn in the former Proposition.
Foritthe rars both in soins in and out at thetrst Curtace
be in fits of eals transmittion, and the interrals and num-
bers ot those tts betrreen the Arst and second Curtace,
betore and alter reflexion, bc equal; the distances ot
the Tts oF easy transmistion trom cither Curtace, must be
in the lame proorection alter rellerion as betore; that
15, trom the tirst Curtace wrhich transmitted them, in
theprogreltion ot the eren numbers O, 27 4, 6, 8, 1c.
and from the second ihich retlected them, in that ot
the odd numbers 2, 3, 5, 7, Sc. Buctheletro Pro-
positions rill become much more erident by theobser
vations in the follomins part of this BoOk.
IHF