The technology on the processing and detection of the extreme - ultraviolet radiation and x - ray ( euv / x - ray ) optical component is one of the main categories in modern short - wave band optical research 極紫外與x射線( euv x - ray )光學元件的加工與檢測技術的研究是近代短波段光學研究的主要范疇之一。
Short wave is used for wireless communication which the wavelength is from 10m - 100m . in fact , the high frequency part of medium wave usually belongs to short - wave band . so many short wave communication equipments ’ band was extended to 1 . 5 - 20mhz 實際上,許多人也把中波的高頻段( 1 . 5 - 3mhz )歸到短波波段去,所以現(xiàn)有的許多短波通信設備,其波段往往擴展到1 . 5 - 20mhz 。