Biology 1202B Chapter Notes - Chapter 1.1-1.2: Cellular Respiration, Endergonic Reaction, Cell Membrane
1 Feb 2017
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Wavelengths: the distance between two successive peaks of electromagnetic radiation. 2 important functions of light for life on earth: source of energy that directly or indirectly sustains virtually all organisms, provides organism with information about the physical world surrounding them. Chlamydomonas reinhardtii has a eyespot for sensing light in the environment. Distance of 150 million kilometres separating earth from the sun - the sun coverts over 4 million tonnes of matter into energy every second - energy in the form of electromagnetic radiation - Travels in the form of a wave at the speed of light - takes just over 8 minutes to reach earth. Wavelength of electromagnetic radiation ranges from less than one picometre 10^-12 m for cosmic waves to more than a kilometre 10^6 m for radio waves. The sun generates electromagnetic radiation as a result of the nuclear fusion of hydrogen nuclei into helium.
