Biology 1002B Lecture Notes - Electron Configuration, Pi Bond, Chlorophyll
16 Oct 2013
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Gamma rays x-rays ultraviolet radiation near-infrared radiation infrared radiation microwaves radio waves. Gamma rays have more energy and shorter wavelength. Quanta= photon, discrete or quantifiable amount of energy. Energy in quanta/photon of blue light is more than quanta/photon of red light. Have to absorb light to use it. Pigment are the molecules that absorb light. Conjugated system: alternation between double bond and single bond. Couple exceptions: retinale, does involve bonding electrons in interaction of light. Pigments aren"t free in cells, they are bound specifically to proteins. When isolate proteins you can keep pigment attached, giving the protein a color. Pigments proteins complexes can be seen without adding color. Chlorophyll has two excited states; higher excited state and lower excited state. Shine light on chlorophyll, depending on the color and wavelength, can excite it. Higher excitation state decays to lower excited state. Doesn"t matter whether you absorb blue or red photon, except for the fact that energy released is different.
