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What is visible light? Electromagnetic radiation of a wavelength that irritates the nervous receptors in the eyes. ROY G BIV Primary colors of visible.

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Presentation on theme: "What is visible light? Electromagnetic radiation of a wavelength that irritates the nervous receptors in the eyes. ROY G BIV Primary colors of visible."— Presentation transcript:

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2 What is visible light? Electromagnetic radiation of a wavelength that irritates the nervous receptors in the eyes. ROY G BIV Primary colors of visible light Composed of particles of energy called: Photons or Quanta

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4 Once a photon of light strikes an object two things happen: 1.Some of the energy is absorbed. 2.Some of the energy is reflected. The absorbed energy is converted to heat or another type of energy The reflected energy is the color that we see when looking at the object. PHOTON Energy Absorbed Energy Reflected

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6 Photosynthesis Video http://youtu.be/mYbMPwmwx88

7 Reactions of Photosynthesis Light Reactions Photolysis - Non-cyclic Pathway [ H +, e -, O 2 ] Photophosphorylation Non-cyclic and Cyclic Pathways [ ADP + P -> ATP ] Dark Reactions Calvin – Benson Cycle Carbon Fixation - Reduction of CO 2 to C 6 H 12 O 6

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16 C4 Plants C4: Orange C3 : Yellow Forest : Green 4 % of Plants are C4 18% of Crops are C4 Evolved from C3 about 25 Million years ago

17 Crassulacean Acid Metabolism (CAM) succulent plants, Cacti, Pineapple C4 Plants : sugar cane and corn crabgrass

18 Structure of a Leaf

19 In C3 plants the Bundle Sheath has no Chloroplasts but in C4 plants they do.

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21 C4 and CAM

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