BIOL 1000- Final Exam Guide - Comprehensive Notes for the exam ( 49 pages long!)
Document Summary
Light has wave properties light travels in waves. Variable wavelength (distance between 2 peaks and energy: typically measured in nanometer ((cid:883)(cid:882) 9m) wavelength and energy inversely related the longer the wavelength the lower the energy of the photon. Light can either be absorbed, reflected or transmitted. Photons can only be absorbed if its energy matches the energy required to move the electron to its excited state, if it doesn"t match then it is either transmitted or reflected. Light has two major functions in living systems: energy, information light must be absorbed photon: packets of energy with no mass, absorbed by electrons pigment: molecules that can absorb photons of light (ex. Chlorophyll a) common in all pigments is the double/single carbon bond. Conjugated system: delocalized electrons electromagnetic radiation: when hydrogen is converted into helium at a rate of (cid:885). (cid:886) (cid:883)(cid:882) 9 hydrogen nuclei per second the sun converts over 4 million ton into energy.
