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Ch. 26 Electromagnetic Waves

Ch. 26 Electromagnetic Waves. Thomson’s experiments. Cathode ray tube-generates stream of electrons (electric field) Charge to Mass Ratio Bqv=mv 2 /r q/m=v/Br. Charge to mass ratio of an Ion r=mv/qB KE=1/2 mv 2 q/m=2V/B 2 r 2. Electromagnetic Waves. Transverse Wave

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Ch. 26 Electromagnetic Waves

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  1. Ch. 26Electromagnetic Waves

  2. Thomson’s experiments • Cathode ray tube-generates stream of electrons (electric field) • Charge to Mass Ratio Bqv=mv2/r q/m=v/Br

  3. Charge to mass ratio of an Ion r=mv/qB KE=1/2 mv2 q/m=2V/B2r2

  4. Electromagnetic Waves • Transverse Wave • Vibrating electric charges through a magnetic field. • Magnetic fields and Electric charges exist w/o matter

  5. Faraday’s Law-change in mag. Field= change in electric. Fields (vice versa) • Travel at 300,000,000 m/s in space (speed of light) • Waves and particles photons

  6. Each E-Wave has a different range of frequency. wavelength=v/f v=c (3e8)

  7. AM frequency range from 540,000 to 1,600,000 Hz • FM 88 million-108 million

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