BIOL 1000 Chapter Notes - Chapter 1: Atp Synthase, Sun Tanning, George Wald
15 Oct 2013
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Light has 2 important functions: source of energy for all organisms and. Chapter 1: light and life provided info with world around them: eg green algae. Each cell has a large chloroplast that uses energy in which it uses to make enrgy rich molecules through photosynthesis. Has eyespot( gathers information about location/intensity if light source) The only reason we have life is due due to the distance between earth and the sun (150mil km) Light is defined as the visible part of the em spectrum that we can detect with out eyes. Light has no mass; composed of photons (particle/wave duality) Light understood as wave of photons (inverse relationship between wl and energy) When photon hits an object, it"s either transmitted, reflected or absorbed. Its to be used as an energy/source of info; has to be aborsorbed. Occurs when energy of photon electron within molecule pigments: molecules that absorb photons.
