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Chapter 7 Light: Notes

Chapter 7 Light: Notes - Chapter 7 Light Notes 1 blackbody...

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Chapter 7 Light: Notes 1. blackbody radiation – Visible light emitted from incandescent sources at high temperatures produces electromagnetic radiation that is given off from matter at any temperature. Refers to an idealized material that prefectly absorbs and perfectly emits electomagnetic radiation. Radiation originates from the acceleration of charges particles near the surface of an object. Frequency of the blackbody radiation is determined by the temperature of the object. 2. incandescent – Visible light given off as a result of high temperatures. A flame from a burning source, ordinary light blub, and the sun are all incandescent sources because of the high temperatures. How is the light produced? Electromagnetic wave model. Shows relationship between electricity, magnetism, and light. Pictures electromagnetic wave forming whenever and electric charge is accelerated by some external force. 3. index of refraction – The ratio of c (speed of light in a vacuum: 3.00*10^8 m/s) to the speed of light in some transparent material, v , is called the index of refraction, n , of that material c n= v 4. interference – Can only be explained by waves. Discovered by Thomas Young in 1801.
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