Details Title: astronomy Description: the universe Total Flash Cards: 17 Created: 01/16/2008 08:12:29		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physics Flashcards
Cards in this set: Term wave Definition disturbance in the particle's electric field Term magnetic field Definition accompanies every changin electric field, govern influence of magnetized objects, exert forces on moving electric charges Term electromagnetism Definition electric AND magnetic fields Term at what speed do electromagnetic waves move? Definition speed of light Term what determines color of beam of light? Definition frequency (or equivalently, its wavelength) Term Definition Term all the spectral regions, including the visible Definition electromagnetic spectrum Term opacity Definition extent to which radiation is blocked by the material through which it is passing Term when is electromagnetic radiation emitted Definition when charges change their state of motion Term temp Definition direct measure of amt of microscopic motion w/i object Term intensity Definition amt or strength of radiation at any point in space Term blackbody Definition an object that absorbs all radiation falling upon it Term blackbody curve Definition must reemit the same amt of energy as it absorbs Term wein's law Definition wavelength is proportional to 1/temp Term stefan's law Definition total energy radiated per second is proportaional to 4th power of temp Term spectral lines are indicators of Definition chemical composition Term Definition