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(xué)元件的加工與檢測(cè)技術(shù)的研究是近代短波段光學(xué)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(shí)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(shè)備,其波段往往擴(kuò)展到1 . 5 - 20mhz 。