Chapter 4 Terms Flashcards
Absorption
The process in which light or other electromagnetic radiation gives up its energy to an atom or molecule
Absorption-line Spectrum
A spectrum showing dark lines at some narrow color regions (wavelengths)
Atmosphereic Window
Wavelength band in which our atmosphere absorbs little radiation
Blackbody
An object that absorbs all radiation that falls upon it and it reflects no light
Conservation of Energy
Energy is never created or destroy, but it may change its form
Continous Spectrum
Spectrum with neither dark absorption nor bright emission line
Doppler Shift
The change of wavelentgh caused by the distance between two objects
Electromagnetic Radiaiton
General term for any king of electromagnetic wave
Electromagnetic Spectrum
Inlcudes radio, mircrowave, infrared, visible light, ultraviolet, X rays, and gamma rays
Electromagnetic Wave
Visible light is an electromagnetic wave and the wavelength determines its color
Element
Substance such as hydrogen, carbon, oxygen and so on that cannot be broken down into a simple chemical substance
Emission
The production of light or more specific - Electromagnetic radiation by an atom or other object
Emission-Line Spectrum
A spectrum consisting of bright lines at certain wavelengths separated by dark regions in which there is no light
Energy Level
Any of the numerous orbitals that an electron can occupy in an atom or molecule
Excited
When electrons are not in their lowest energy level
