optiline kiirgus, mille lainepikkus on pikem kui nähtaval kiirgusel
Hea teada
Infrapunakiirguse lainepikkuspiirkond 780 nm kuni 106 nm on tavaliselt jaotatud alapiirkondadeks IR-A (780 nm kuni 1400 nm, IR-B (1400 nm kuni 3000 nm) ja IR-C (3000 nm kuni 106 nm)
optical radiation for which the wavelengths are longer than those for visible radiation
Hea teada
For infrared radiation, the range between 780 nm and 106 nm is commonly subdivided into: IR-A (780 nm to 1400 nm), IR-B (1400 nm to 3000 nm), and IR-C (3000 nm to 106 nm).
