Week 2, Lecture 1, Photosynthesis

Week 2, Lecture 1, Photosynthesis - Photosynthesis...

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Unformatted text preview: Photosynthesis Photosynthesis Free Food Free Food B I O L O G Y 0 2 3 30-Dec-09 Gardiner 2 The Spectrum • Light is a form of energy – Electromagnetic energy • Light energy travels in waves – Like waves in water – Disturbances in electromagnetic fields • Distance between crests of electromagnetic waves called the wavelength See Fig. 1.4 B I O L O G Y 0 2 3 30-Dec-09 Gardiner 4 Light • Photons – particles of light – Act like objects in that they have fixed quantity of energy – Amount of energy inversely related to their wavelength • Shorter the wavelength the greater the amount of energy • Photon of violet light packs nearly twice the energy of a photon of red light B I O L O G Y 0 2 3 30-Dec-09 Gardiner 5 See Fig. 1.5 B I O L O G Y 0 2 3 30-Dec-09 Gardiner 7 Life is Solar Powered Autotrophic • Self feeding • Don’t eat other organisms as energy source • Light is energy source • Photoautotroph Heterotrophic • Eat other organisms as food source B I O L O G Y...
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This note was uploaded on 04/18/2010 for the course BIOLOGY 1223 taught by Professor Gardiner/lajoie during the Fall '09 term at UWO.

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Week 2, Lecture 1, Photosynthesis - Photosynthesis...

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