电磁波谱 f(Hz)1091021041061081010101210141016101810201021024 Radio Microwave Infrared UV X-ray Gamma ray Visible light 波长×频率=光速 f(Hz)1041051061071081091010101110121013101410151016 Fiber Twisted pair Satellite Coax Terrestria AM FM microwave aritime radio radi TV Band LF MF HF VHF UHF SHF EHF THF 5电磁波谱 5 波长×频率 = 光速