Infrared radiation is popularly known as "heat radiation"[citation needed], but light and electromagnetic waves of any frequency will heat surfaces that absorb them. Infrared light from the Sun accounts for 49% of the heating of Earth, with the rest being caused by visible light that is absorbed then re-radiated at longer wavelengths. Visible light or ultraviolet-emitting lasers can char paper and incandescently hot objects emit visible radiation. Objects at room temperature will emit radiation concentrated mostly in the 8 to 25 µm band, but this is not distinct from the emission of visible light by incandescent objects and ultraviolet by even hotter objects (see black body and Wien's displacement law). COUNT 4
QSN1 What is a commonly used term for infrared radiation? ANS1 heat radiation QSN2 What percentage of the Earth's heat is derived from the Sun's infrared light? ANS2 49% QSN3 What is the common range of emitted radiation of room temperature objects, in micrometers?  ANS3 8 to 25 QSN4 Other than infrared light, what type of light is responsible for heating the Earth? ANS4 visible