BIOL 1000 Lecture Notes - Lecture 3: Electron Transport Chain, Phototaxis, Opsin
Document Summary
Biol 1000 lecture #3 chapter #1: light and life. Light serves as: source of energy that sustains all life and, provide organisms info about the world. Both purposes rely on organisms to capture the light. Sun converts over 4 million tons of matter/s as electromagnetic radiation (travels at the speed of light) Moves in the form of two waves 1) electrical 2) magnetic. Portion of the electromagnetic spectrum that humans can detect w/ their eyes. Narrow band of electromagnetic spectrum spanning the wavelength in nanometers (400nm blue to 700nm red) Anything outside is ultraviolet or infrared radiation. It is the distance between 2 successive peaks o distinguishes electromagnetic radiation. Action of spectrum: effectiveness of wavelength on biological process. They are a stream of energy particles. They have no mass, each pack having a specific amount of energy. When light hits an object, it either: reflects off the object, transmit through or, absorbed. They are molecules that can absorb light.
