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Electromagnetic Spectrum
 Lecture number:
 19
 Pages:
 3
 Type:
 Lecture Note
 School:
 The University of Vermont
 Course:
 Phys 012  Elementary Physics
 Edition:
 1
Documents in this Packet

6 pages

2 pages

Lecture 38 : Length Contraction
1 pages

Lecture 37 : Time Dilation Practice Problems
2 pages

Lecture 36 : Special Relativity
2 pages

2 pages

Lecture 34 : Quantized Electron Orbitals
3 pages

Lecture 33 : WaveParticle Duality of Light and Electrons
4 pages

Lecture 32 : Photoelectric and Compton Effects
3 pages

3 pages

5 pages

Lecture 30 : Particles and Waves
2 pages

Lecture 29 : Single Slit Diffraction and Resolving Power
2 pages

Lecture 28 : Thin Film Interference and Diffraction
2 pages

Lecture 27 : Diffraction and Thin Film Interference
3 pages

Lecture 26 : Diffraction and Interference
4 pages

4 pages

Lecture 24 : Total Internal Reflection
4 pages

Lecture 23 : Refraction of Light
4 pages

4 pages

Lecture 21 : Light Rays and Reflection
3 pages

4 pages

Lecture 20 : In Class Review for Exam 2
2 pages

Lecture 18 : Electromagnetic Waves
5 pages

Lecture 17 : Self Inductance, Transformers, and Circuits Containing Inductors
4 pages

3 pages

3 pages

Lecture 14 : Electromagnetic Induction
4 pages

3 pages

Lecture 12 : Currents through Magnetic Fields
3 pages

Lecture 11 : Magnetic Fields and Forces
4 pages

Lecture 10 : Kirchhoff's Rules and RC Circuits
5 pages

5 pages

Lecture 9 : Resistors and Capacitors.
4 pages

Lecture 8 : Electric Currents, Ohm's Law, and
4 pages

Lecture 7 : Capacitors and Dielectrics
3 pages

Lecture 6 : Electric Potential Energy and Electric Potential
4 pages

Lecture 5 : Electric Fields and Forces (18.9,19.1)
3 pages

Lecture 4 : Electric Field Lines
3 pages

2 pages

Lecture 1 : Charge and Charge Transfer
2 pages

2 pages
Unformatted text preview:
Lecture 7 Outline of Last Lecture I. Electromagnetic Waves a. Ex) Linearlypolarized electromagnetic wave travelling in the +x direction i. Waves will actually oscillate; the diagram above is frozen in time. ii. E = Emaxcos(kx – ωt) ; E = Emaxcos(kx + ωt) if wave was travelling in –x direction iii. B = Bmaxcos(kx – ωt) ; B = Bmaxcos(kx + ωt) if wave was travelling in –x direction iv. ω = angular frequency = 2πf = 2π/T ; f = frequency = 1/T ; T = period v. k = 2π/λ ; λ = wavelength 1. measured in m1 b. Find wave propagation using right hand rule c. E is always perpendicular to B. d. E and B are in phase (reaching maximum values at the same time). e. E = cB; c = speed of light or any electromagnetic wave travelling through a vacuum = 1/√(μ0ξ) f. In a vacuum, the wave speed is c; c = λf g. Ex) Alternating current voltage supply connected to two conductive bars i. Current will continuously switch directions, causing E and B to switch directions. ii. In an LC circuit… 1. to receive signals from alternating electric field: 2. to receive signals from alternating magnetic field: Econ 101 1st Edition
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