Biology 1201A Lecture Notes - Lecture 7: Electromagnetic Spectrum, Light-Harvesting Complex, Thylakoid
25 Nov 2016
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Electromagnetic energy: given off by sun due to the fusion of hydrogen, energy travels in waves (like waves in water, distance bw the crests of the waves determines type. Electromagnetic spectrum: range of electromagnetic energy is huge, name based on its wavelength, energy of a wavelength is determined by its wavelength, how much energy is actually available. Light: portion of the electromagnetic spectrum that humans can see. Very small portion of the spectrum: photons: energy particles of light. Act like particles in motion - have a xed quantity of energy. Wavelength of light is inverse to the amount of energy: violet light (shorter wavelength) has more energy than red light. Light and matter: light has no mass but is still able to interact with matter, when light hits an object . Absorbed by the object: excites an electron raising energy level, to be used as a source of energy it must be absorbed.
