17-21-002

optical radiation

electromagnetic radiation at wavelengths between the region of transition to X-rays (λ ≈ 1 nm) and the region of transition to radio waves (λ ≈ 1 mm)

Note 1 to entry: This entry was numbered 845-01-02 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-848 in CIE S 017:2011.