“skip distance”的概念、定义、习题解题方法及翻译-物理辞典

单词	skip distance
释义	skip distance The minimum distance from the transmitter of a radio wave at which reception is possible by means of a sky wave (see radio transmission). If a radio wave strikes the ionosphere at a small angle of incidence the wave passes through it and is not reflected. There is therefore a minimum angle of incidence at which reflection occurs for a given frequency. This leads to a region around a transmitter in which sky waves cannot be received. As the frequency of the transmission increases the minimum angle of incidence at which ionospheric reflection occurs becomes greater. Above about 4 megahertz there may be a region of several hundred kilometres around a transmitter, which is within the skip distance and in which ground waves are too attenuated to be effectively received. In this region no reception is possible
随便看	catalytic converter catastrophe theory catenary cathetometer cathode cathode rays cathode-ray oscilloscope cathode-ray tube cathodic protection cation causality caustic Cavendish, Henry cavitation cavity resonator CD CD-I CD-ROM celestial equator celestial mechanics celestial sphere cell Celsius scale cementation cementite

物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。