cum E ang.tlum incidens puncto B refringi-tur linea BC reciproce per C hujuslinea B A refringetur,quoties perC B inci-derit,&confequenterficutangulusinclinationis A B l in raro ad K B C in denforefractum ad perpendicularem K B I, ka reverse inclinationis angulus K B Cexdenfo paritinraroangulum… … ;(T, L i iovoM
Optics, Geometrical · Optical instruments
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