r. . in vitroradiusGD cujus in- chnatio ad fuperficiem AB eriticgraduum, cum ab angulo HDE ^qua- i anguloinclmationis FD C detradlus fitangulus HD G priornempeangu-lus refraaioms s.graduum. Sed perfuppof.^.fupracumfit eadem refralioradiorum m mgrcilu, & egreffu , radius GD refringeturin D ,… … Ab 9cre ia■«ittnrn an-gulas indi-nationis efttriplus an-g.Ii Refra-ftionis: Avitroinae-reffleft du-plus anguliHeftadio-nis. Qorollarium* In ingrefru ab aere in vitrum ufque ad 20. grad. angulus inclinationisefttriplus anguli refraaionis & fbsquialter anguli Refra^i ; in egrcffu vcr6in aerem,…
Optics, Geometrical · Optical instruments
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