Plural: actinometers
ETYM Greek aktis, aktin ray + -meter.
An instrument for measuring the intensity of radiation (usually by the photochemical effect).
Instrument for measuring incident radiation.
Instrument measuring heating power of the sun's rays; Photography, instrument for calculating exposure times.
actinism · actinium · actino · actinolite · actinolitic · actinometer · actinometric · actinometrical · actinometry · actinomorphic · actinomycete · actinomycosis
1. Sprava kojom se meri jačina toplotnog zračenja Sunca.
2. Optički ili električni pribor za merenje trajanja ekspozicije u fotografiji.