Lect5414 - to direction of motion-fields alternate in direction from point to point-the electric and magnetic fields are “in phase” EM waves

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1. If a charged particle travels in a straight line, can you say that there is no magnetic field in that region of space? Explain. 2. A proton and and electron have the same velocity. What happens if they enter a bending magnet with a magnetic field perpendicular to their velocity?
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Maxwell’s Equations
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- Gauss’s law, which is generalized form of Coulomb’s law, that relates electric fields to electric charges.
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- Gauss’s law for magnetic fields, except that there are no magnetic monopoles. Magnetic field lines are always continuous.
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- Faraday’s law: an electric field is produced by changing magnetic field.
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- a magnetic field is produced by an electric current, or by a changing electric field .
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Production Of Electromagnetic Waves
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-the electric and magnetic fields at any point are perpendicular to each other and
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Unformatted text preview: to direction of motion;-fields alternate in direction from point to point;-the electric and magnetic fields are “in phase”. EM waves are produced by accelerating electric charges. Speed of EM Waves 1 μ ε = v Electromagnetic Spectrum Example Calculate the wavelength: (a)Of a 60-Hz EM wave; (b)Of a 93.3 MHz FM radio wave; (c)Of a beam of visible red light from a laser at frequency 4.74x10 14 Hz. 1. Which of the following a/m waves has the highest frequency: radio, microwaves, visible light, ultraviolet light, or X-rays? 2. What is the difference between X rays and gamma rays? 3. Which of the following is not an electromagnetic wave: radio, television, blue light, infrared light, or sound? 4. What does it mean when your local disc jockey says, that “you are listening to radio 1380”?...
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This note was uploaded on 05/05/2009 for the course PHYSICS 1002 taught by Professor Borovitskaya,elena during the Spring '09 term at Temple.

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Lect5414 - to direction of motion-fields alternate in direction from point to point-the electric and magnetic fields are “in phase” EM waves

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