[BIOL 1000] - Final Exam Guide - Everything you need to know! (127 pages long)
Document Summary
We need light to sustain all these activities. Light & light light as a source of energy light - a source of energy. Definition of light: portion of the electromagnetic spectrum that humans can detect with their eyes (400-700 nm = visible light) This portion is the most abundant light that comes from the sun and reaches the earth. Most of the shorter forms of radiation get absorbed and don(cid:495)t reach earth. To impact all living things, its only this visible light that interacts and makes an impact. It can be converted into energy to supply living activities light encounters matter. Absorbed only by this way can it be converted into energy for living organisms. To be used as energy or info, absorption must take place. When light hits it, converted to energy, photon then moves electron from ground to excited state. When it moves back down, energy is released as heat & light (florescence)
