[BIOL 1000] - Final Exam Guide - Ultimate 232 pages long Study Guide!
29 Nov 2016
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Document Summary
Light: electromagnetic radiation (electric waves are perpendicular to magnetic) Variable wavelength (distance b/t 2 peaks) & energy. Energy determined by 2 peaks of wavelength (longer waves= less energy; short wavelength=more energy) Visible region of electromagnetic spectrum that humans can detect w/their eyes. How does light interact w/ matter: reflected off object. Transmitted through the object (doesn"t interact: absorbed by the lab (more biologically relevant causes further advancements) Photons excited e- from ground state to excited state. When electron falls back to excited state it releases free energy which results in other processes. Colour you see is the colour (wavelength) that is not absorbed by pigment. Organic compound give characteristic of colour reflect certain wavelengths of light. E- in bonds of pigments respond to light of particular frequencies. E- emit all/part of absorbed energy as a photons of particular frequency. Can be easily excited - used to do work. Electrons capture phonon/energy which is used to do work.
