# Optica γ΄.

Euclid, Optica, γ΄.. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/euclid/optica/%CE%B3%CE%84.

Ἕκαστον τῶν ὁρωμένων ἔχει τι μῆκος ἀποστήματος, οὗ γενόμενον οὐκέτι ὁρᾶται. ἔστω γὰρ ὄμμα μὲν τὸ Β, ὁρώμενον δὲ τὸ Γ∠. φημὶ δή, ὅτι τὸ Γ∠ ἔν τινι ἀποστήματι γενόμενον οὐκέτι ὁραθήσεται. γεγενήσθω γὰρ τὸ Γ∠ ἐν τῷ μεταξὺ διαστήματι τῶν ὄψεων, ἐφʼ οὗ τὸ Κ. οὐκοῦν πρὸς τὸ Κ οὐδεμία τῶν ἀπὸ τοῦ Β ὄψεων προσπεσεῖται· πρὸς ὃ δὲ αἰ ὄψεις οὐ προσπίπτουσιν, ἐκεῖνο οὐχ ὁρᾶται. ἕκαστον ἄρα τῶν ὁρωμένων ἔχει τι μῆκος ἀποστήματος, οὗ γενόμενον οὐκέτι ὁρᾶται.

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Euclid, Optica, ed. Johan Ludvig Heiberg, Heinrich Menge. Text: The Greek Library, from the Perseus Digital Library and other open sources, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Source: https://thegreeklibrary.pages.lisn.upsaclay.fr/works/tlg1799.tlg009.local001/.