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Vocab

QuestionAnswer
Absorption Spectrum A graph that shows electromagnetic radiation absorbed as a function of frequency.
Carotenes A class of compounds responsible for the color of carrots and fall leaves
Chlorophylls A class of compounds found in plant leaves that produce their green color.
Electric Field The area around a charged particle where forces are experienced.
Electromagnetic Radiation Radiation that is propogated by the combination of electric and magnetic fields including gamma rays, x rays, ultraviolet light, visible light, infared light, microwaves, and radio waves.
Electronic Relaxation An electronic transition in which an electron goes from a higher energy orbit to a lower energy one
Electronic Transition When the electrons in an atom or molecule move from one energy state to another.
Energy State The electron configuration of a molecule or atom with electrons in a perticular orbits and therefore at particular energies.
Excited State An unstable state for an atom or molecule in which energy has been absorbed but not reemitted.
Fluorescence The fast emission of light following electronic excitation.
Frequency For a wave, the number of cycles or crests that pass through a point in one second, usually reported in units of cycles per second or hertz.
Gamma Rays The shortest wavelength and most energetic form of electromagnetic radiation.
Infared Light (IR) That portion of the electromagnetic spectrum that is immediately adjacent to red light. I
Laser An acronym for light amplification by stimulated emission of radiation.
Laser Cavity In a laser, the lasing medium is placed inside a laser cavity consisting of two mirrors, one of which is only partially reflecting.
Lasing Medium Laser light is formed by putting electrical or light energy into an element or a compound called the __________
Magnetic Field The area around a magnet where forces are experienced.
Magnetic Resonance Imaging (MRI) A type of spectroscopy involving magnetic fields and radio waves that allows medical doctors to image organs and structures within the human body
Microwave Radiation The fraction of the electromagnetic spectrum that is between the infared region and the radio wave region.
Nuclear Magnetic Resonance (NMR) A type of spectroscopy involving magnetic fields and radio waves and often used by chemists and biochemists to deduce molecular structures.
Phosphorescence The slow emission of light following electronic excitation
Photodecomposition The breaking of bonds within molecules due to the absorption of light
Photons Particles of light
Radio Waves The longest wavelength and least energetic form of electromagnetic radiation
Relaxation Time The time required for nuclei to return to their original orientation after being pushed by electromagnetic radiation
Resonance Frequency The exact electromagnetic frequency that causes an energy transition in a molecule or atom
Spectroscopy The interaction of light with matter
Ultraviolet Light (UV) The fraction of the elecromagnetic spectrum that is between the visible region and the xray region
Visible Light The fraction of the electromagnetic spectrum that is visible to the human eye
Wavelenth The distance between wave crests, usually reported in units of length such as meters or nanometers
x-rays The fraction of the electromagnetic spectrum that is between the ultraviolet region and teh gamma ray region
Created by: zfran