10.2 - 10.2 How Does Chlorophyll Capture Light Energy?...

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10.2 How Does Chlorophyll Capture Light Energy? Photosynthesis begins with sunlight striking chlorophyll Photosynthesis converts the electromagnetic radiation from sunlight into energy in the form of C-H and C-C bonds or sugar Electromagnetic radiation is characterized by its wavelength which is what? Answer: the distance between two successive wave crests (or wave troughs) and what does this determine? Answer: the type of electromagnetic radiation Then they show you the electromagnetic spectrum and explain that shorter wavelengths of electromagnetic radiation have more energy than longer ones do o Blue and ultraviolet light have a lot more energy than red and infrared light do Photons are discrete packets of light energy or a particle of light All the photons and wavelengths have a certain amount of energy that pigment molecules absorb Photosynthetic Pigments Absorb Light When a photon strikes an object it can do three things: what are they? Answer: absorbed, transmitted, or reflected Then it explains absorption and reflection in pigments and what we see, which we’ve covered already Goes over thin layer chromatography which separates the pigments in the extract Then they take the pigments and put it on a thin lyaer of porus material that coats a solid support and placed in a solvent which separates the pigments Chromatograph shows different pigments and researches use this to find out the wavelengths that are absorbed
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10.2 - 10.2 How Does Chlorophyll Capture Light Energy?...

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