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Details Title: Physics Description: Chapter 26 Total Flash Cards: 9 Created: 05/01/2006 09:17:32	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Electromagnetic Wave Definition An energy-carrying wave emitted by a vibrating charge (often electrons) that is composed of oscillating electric and magnetic fields that regenerate one another. Term Electromagnetic Spectrum Definition The range of electromagnetic waves extending in frequency from radio waves to gamma rays. Term Transparent Definition The term applied to materials through which light can pass in straight lines. Term Opaque Definition The term applied to materials that absorb light without reemission and thus through which light cannot pass. Term Shadow Definition A shaded region that appears where light rays are blocked by an object. Term Umbra Definition The darker part of a shadow where all the light is blocked. Term Penumbra Definition A partial shadow that appears where some but not all of the light is blocked. Term Solar Eclipse Definition An event wherein the Moon blocks light from the Sun and the Moon's shadow falls on part of the Earth. Term Lunar Eclipse Definition An event wherein the Moon passes into the shadow of the Earth.