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Chapter 24 Electromagnetic Waves
24.1  The Nature of Electromagnetic Waves This picture shows the wave of the radiation field far from the antenna.  The speed of an electromagnetic wave in a vacuum is:
24.2  The Electromagnetic Spectrum Like all waves, electromagnetic waves have a wavelength and  frequency, related by:
24.2  The Electromagnetic Spectrum Example 1  The Wavelength of Visible Light Find the range in wavelengths for visible light in the frequency range between 4.0x10 14 Hz and 7.9x10 14 Hz.
24.2  The Electromagnetic Spectrum Conceptual Example 2  The Diffraction of AM and FM Radio Waves Diffraction is the ability of a wave to bend around an obstacle or the  edges of an opening.  Would you expect AM or FM radio waves to  bend more readily around an obstacle such as a building?
24.3  The Speed of Light The speed of light in a vacuum
24.3  The Speed of Light Conceptual Example 3  Looking Back in Time A supernova is a violent explosion that occurs at the death of certain stars.  The figure shows a photograph of the sky before and after a supernova.  Why do astronomers say that viewing an event like this is like looking back in time?
24.3  The Speed of Light Maxwell’s prediction of the speed of light
24.4  The Energy Carried by Electromagnetic Waves Electromagnetic waves, like water waves, carry energy.
24.5  The Doppler Effect and Electromagnetic Waves ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
24.5  The Doppler Effect and Electromagnetic Waves Example 6  Radar Guns and Speed Traps The radar gun of a police car emits an electromagnetic wave with a  frequency of 8.0x10 9 Hz.  The approach is essentially head on.  The wave from the gun reflects from the speeding car and returns to the police car, where on-board equipment measures its frequency to be greater than the emitted wave by 2100 Hz.  Find the speed of the car with respect to the highway.  The police car is parked.
24.5  The Doppler Effect and Electromagnetic Waves frequency “observed” by speeding car frequency observed by police car

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AP Physics - Chapter 24 Powerpoint

  • 2. 24.1 The Nature of Electromagnetic Waves This picture shows the wave of the radiation field far from the antenna. The speed of an electromagnetic wave in a vacuum is:
  • 3. 24.2 The Electromagnetic Spectrum Like all waves, electromagnetic waves have a wavelength and frequency, related by:
  • 4. 24.2 The Electromagnetic Spectrum Example 1 The Wavelength of Visible Light Find the range in wavelengths for visible light in the frequency range between 4.0x10 14 Hz and 7.9x10 14 Hz.
  • 5. 24.2 The Electromagnetic Spectrum Conceptual Example 2 The Diffraction of AM and FM Radio Waves Diffraction is the ability of a wave to bend around an obstacle or the edges of an opening. Would you expect AM or FM radio waves to bend more readily around an obstacle such as a building?
  • 6. 24.3 The Speed of Light The speed of light in a vacuum
  • 7. 24.3 The Speed of Light Conceptual Example 3 Looking Back in Time A supernova is a violent explosion that occurs at the death of certain stars. The figure shows a photograph of the sky before and after a supernova. Why do astronomers say that viewing an event like this is like looking back in time?
  • 8. 24.3 The Speed of Light Maxwell’s prediction of the speed of light
  • 9. 24.4 The Energy Carried by Electromagnetic Waves Electromagnetic waves, like water waves, carry energy.
  • 10.
  • 11. 24.5 The Doppler Effect and Electromagnetic Waves Example 6 Radar Guns and Speed Traps The radar gun of a police car emits an electromagnetic wave with a frequency of 8.0x10 9 Hz. The approach is essentially head on. The wave from the gun reflects from the speeding car and returns to the police car, where on-board equipment measures its frequency to be greater than the emitted wave by 2100 Hz. Find the speed of the car with respect to the highway. The police car is parked.
  • 12. 24.5 The Doppler Effect and Electromagnetic Waves frequency “observed” by speeding car frequency observed by police car