# Scholia in opticorum recensionem Theonis (scholia vetera) 28

Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), Section 28. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/scholia-in-euclidem/scholia-in-opticorum-recensionem-theonis-scholia-vetera/28

28. Τὸ ι΄ ἐν ἄλλῳ οὕτως· ἔστω γὰρ ὄμμα τὸ Β ἄνω τοῦ ΓΚ ἐπιπέδου κείμενον, ἀφʼ οὗ ὄμματος προσ πιπτέτωσαν ἀκτῖνες αἱ ΒΓ, Β∠, ΒΖ, ΒΚ, ὧν ἡ ΒΚ κάθετος ἔστω ἐπὶ τὸ ὑποκείμενον ἐπίπεδον. λέγω, ὅτι τὸ Γ∠ τοῦ ∠Ζ μετεωρότερον φαίνεται, τὸ δὲ ∠Ζ τοῦ ΖΚ. εἰλήφθω γὰρ ἐπὶ τῆς ΖΚ τυχὸν σημεῖον τὸ Ε, καὶ ἤχθω πρὸς ὀρθὰς τῇ ΖΚ ἡ ΕΗ. καὶ ἐπεὶ αἱ ὄψεις πρότερον πρὸς τὴν ΗΕ προσπίπτουσιν ἤπερ πρὸς τὴν ΕΓ, προσπιπτέτω τῇ ΗΕ ἡ μὲν ΒΓ κατὰ τὸ Η σημεῖον, ἡ δὲ Β∠ κατὰ τὸ Λ, ἡ δὲ ΒΖ κατὰ τὸ Μ. ἐπεὶ οὖν τὸ Η τοῦ Λ μετεωρότερόν ἐστι, τὸ δὲ Λ τοῦ Μ, ἀλλʼ ἐν ᾧ ἐστι τὸ Η, ἐν τούτῳ τὸ Γ, ἐν ᾧ δὲ τὸ Λ, ἐν τούτῳ τὸ ∠, ἐν ᾧ δὲ τὸ Μ, ἐν τούτῳ τὸ Ζ, διὰ δὲ τῶν ΒΓ, Β∠ ἡ ∠Γ φαίνεται, διὰ δὲ τῶν Β∠, ΒΖ ἡ Ζ ∠, διὰ δὲ τῶν ΒΖ, ΒΚ ἡ ΚΖ, οὐκοῦν ἡ μὲν Γ∠ τῆς ∠Ζ μετεωροτέρα φαίνεται, ἡ δὲ ΔΖ τῆς ΖΚ· τὰ γὰρ ὑπὸ μετεωροτέρων ἀκτίνων ὁρώμενα μετεωρότερα φαίνεται. τῶν ἄρα κάτω τοῦ ὄμματος κειμένων καὶ τὰ ἑξῆς. Ad prop. XI.

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Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), ed. Johan Ludvig Heiberg, H. 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/tlg5022.tlg004.local001/.