Properties of Light

Properties of Light - Formula Sheet = 2 f Z L = L 1 ZC = C...

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Formula Sheet () 2 2 res 2 1 1 L C LC LRC R R f Z= ω L ω C X= Z Z +R ω = P =V rms I rms ω π =
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PHY 2049C – General Physics B Fields, Circuits, Waves, Light Today: 1) Properties of E.M. waves 2) Refraction 3) Reflection
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Maxwell's Equations: ...” and there was light” 0 00 0 1 0 inside B E E dA= Q Gauss's Law Φ Ed l = F a r a d a y ' s L a w t B dA no magnetic poles Bd l = μ I+ με Ampere's Law + Maxwell t ε ⋅− ⋅= ∂Φ G G G G G G G G v
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Summary: E-M waves All Electromagnetic Waves travel at the “speed of light” c = 2.997*10 8 m/s The E and B vectors point perpendicular to the direction of propagation Their wavelength and frequency are related by The Electric and Magnetic Fields have relative strength 1 c f == T λ B = 1 c E
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Properties of EM waves What we call light is just a tiny part of all the different kinds of electromagnetic waves. All kinds have the same speed, The wavelength is approx. the size of the source . c = 3 × 10 8 m s Antennas Electronics Atoms Atomic Nuclei
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Recall: Energy Density in Electric Fields Energy stored in a Capacitor: Therefore, Energy per Volume: 0 22 0 / , 11 C= A d V=E d U= CV = ε EA d ε 2 0 1 /( ) 2 u=U Ad = E
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Recall: Energy Density of Magnetic Fields Energy stored in an Solenoid: Therefore, Energy per Volume: 2 00 2 2 0 , with / 11 22 L= n Al B= μ nI n= N L B U= LI = Al μ μ 2 0 1 /( ) 2 B u=U Al =
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This note was uploaded on 06/29/2010 for the course PHY2049C PHY2049C taught by Professor Duke during the Summer '10 term at FSU.

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Properties of Light - Formula Sheet = 2 f Z L = L 1 ZC = C...

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