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length of atmosphere over which a beam of light travels before its luminous flux is reduced to 5 % of its original value, kaugus, mis on määratletud kui atmosfääri pikkus, milles valguskiir liigub, enne kui selle valgusvoog väheneb 5 %-ni selle algväärtusest
meteorological optical range . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/meteorological%20optical%20range/1/eng (19.06.2026)