单词	shadow
释义	shadow An area of darkness formed on a surface when an object intercepts the light falling on the surface from a source. In the case of a point source the shadow has a sharply defined outline. If the source has an appreciable size the shadow has two distinct regions; one of full-shadow, called the umbra , the other of half-shadow, called the penumbra (see illustration). Shadows
随便看	entropy ephemeris ephemeris time epicentre epicycle epidiascope epitaxy epithermal neutron EPM EPROM equation of motion equation of state equation of time equator equilibrium equinox equipartition of energy erecting prism erg ergodic hypothesis ergodicity ergonomics Esaki diode ESCA escape velocity

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。