The two accurate statements about the different types of radiation measured in the Total Solar Irradiance are:
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Radiation in the short extreme ultraviolet (EUV) range is most likely to have the widest variation.
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Radiation in the visible light wavelengths is emitted steadily and constantly from the sun.
These statements reflect the variability in the EUV radiation due to solar activity, while visible light emissions from the sun tend to be more stable under normal conditions.