claim: Yemen's temporary capital is not Aden.
evidence: Actinometers are instruments used to measure the heating power of radiation .. power. power ( physics ). radiation. electromagnetic radiation. They are used in meteorology to measure solar radiation as pyranometers , pyrheliometers and net radiometers .. radiation. electromagnetic radiation. meteorology. meteorology. solar radiation. solar radiation. pyranometers. Pyranometer. net radiometers. Net radiometer. An actinometer is a chemical system or physical device which determines the number of. photons in a beam integrally or per unit time .. This name is commonly. applied to devices used in the ultraviolet and visible wavelength ranges .. ultraviolet. ultraviolet. For example , solutions of iron -LRB- III -RRB- oxalate can be used as a chemical. actinometer , while bolometers , thermopiles , and photodiodes are physical. devices giving a reading that can be correlated to the number of photons. detected .