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valgusstiimuli vaheldumissagedus, millest kõrgemal valguse värelus ei ole tajutav, frequency of alternation of stimuli above which flicker is not perceptible
fusion frequency . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/fusion%20frequency/1/eng (12.07.2026)