01 Photons to Brain

01 Photons to Brain - 01 Photons to Brain I. Light a....

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01 Photons to Brain I. Light a. Wave-like qualities i. Creates interference patterns b. Particle-like qualities i. Same interference pattern even when released one photon at a time c. Electromagnetic Radiation i. ii. Gamma rays x-rays ultraviolet visible light infrared radar FM TV iii. Visible light: 1. Violet blue green yellow orange red d. Interaction with Matter i. ii. Absorption – matter releases photon’s energy as heat iii. Refraction – bending of light 1. Requires difference in density between substances and the lights cannot come to the surface at a perpendicular angle (or else it goes straight through) 2. Photons take the path that will take the least amount of time (light slows down when it goes through a thicker medium a. Causes road mirages, because photons from the sky go through the heated air directly above the road in order to reach the eye in least amount of time iv. Reflection – bounces off of the surface
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1. The percentage of photons that bounce off the surface of glass changes systematically
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This note was uploaded on 04/17/2008 for the course PSC 231 taught by Professor Post during the Fall '08 term at UC Davis.

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01 Photons to Brain - 01 Photons to Brain I. Light a....

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