electro magnetic waves and maxwell’s equationsjworkman/teaching/... · electro magnetic waves and...
TRANSCRIPT
![Page 1: Electro Magnetic Waves and Maxwell’s Equationsjworkman/teaching/... · Electro Magnetic Waves and Maxwell’s Equations. Classical Physics Newton’s Laws - forces, momentum, energy](https://reader030.vdocuments.mx/reader030/viewer/2022041110/5f1021a97e708231d4479a4a/html5/thumbnails/1.jpg)
Electro Magnetic Waves and Maxwell’s Equations
![Page 2: Electro Magnetic Waves and Maxwell’s Equationsjworkman/teaching/... · Electro Magnetic Waves and Maxwell’s Equations. Classical Physics Newton’s Laws - forces, momentum, energy](https://reader030.vdocuments.mx/reader030/viewer/2022041110/5f1021a97e708231d4479a4a/html5/thumbnails/2.jpg)
Classical Physics
Newton’s Laws - forces, momentum, energy
Newton’s Law of Gravitation
Thermodynamics
Maxwell’s Equations
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Maxwell’s Equations
Gauss’s Law, charges produce electric fields
Gauss’s Law for magnetism, no magnetic monopoles
Faraday’s Law, induction, changing B makes E
Ampere-Maxwell Law, currents and changing E makes B
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Lorentz Force
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With Some Math, We Get Electromagnetic
Waves or LIGHT
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Waves
Calc 3 math and differential equations gives
Solutions
Orthogonally propagating E and B
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Light Waves
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Relationship Between E and B
energy density
E and B contribute same energy densityEnergy switches from E to B and back again
Example
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Electromagnetic Spectrum
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Energy Carried by LightPoynting Vector
Example
Power flux, energy per time per unit area
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Average Intensity and Energy densityTime averaged Poynting Flux
Average energy density
Recalling
Example
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Radiation Pressure
Absorbed
Reflectedreality, in between the two
Pressure
absorbed
reflected
Examples
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Intensity