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punkt, kus koonduvad peeglile langevad optilise peateljega paralleelsed valguskiired
nõguspeegli fookus . Koolisõnastikud 2005–2010. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kool_KV/n%C3%B5guspeegli%20fookus/1/est (29.07.2026)
