![Page 1: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/1.jpg)
© 2010 Pearson Education, Inc.
PowerPoint® Lectures for
College Physics: A Strategic Approach, Second Edition
Chapter 25
Electromagnetic
Induction and
Electromagnetic
Waves
![Page 2: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/2.jpg)
© 2010 Pearson Education, Inc.
25 Electromagnetic Induction and Electromagnetic Waves
![Page 3: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/3.jpg)
© 2010 Pearson Education, Inc.
![Page 4: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/4.jpg)
© 2010 Pearson Education, Inc.
![Page 5: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/5.jpg)
© 2010 Pearson Education, Inc.
Reading Quiz
1. Which of the following will cause an induced
current in a coil of wire?
A. A magnet resting near the coil.
B. The constant field of the earth passing
through the coil.
C. A magnet being moved into or out of the coil.
D. A wire carrying a constant current near the
coil.
![Page 6: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/6.jpg)
© 2010 Pearson Education, Inc.
Answer
1. Which of the following will cause an induced
current in a coil of wire?
A. A magnet resting near the coil.
B. The constant field of the earth passing
through the coil.
C. A magnet being moved into or out of the
coil.
D. A wire carrying a constant current near the
coil.
![Page 7: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/7.jpg)
© 2010 Pearson Education, Inc.
Reading Quiz
2. The speed of electromagnetic waves in a
vacuum
A. depends upon the wavelength.
B. depends on the photon energy.
C. is the same as the speed of sound.
D. is the same for all waves regardless of
wavelength.
![Page 8: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/8.jpg)
© 2010 Pearson Education, Inc.
Answer
2. The speed of electromagnetic waves in a
vacuum
A. depends upon the wavelength.
B. depends on the photon energy.
C. is the same as the speed of sound.
D. is the same for all waves regardless of
wavelength.
![Page 9: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/9.jpg)
© 2010 Pearson Education, Inc.
Electromagnetic Waves
![Page 10: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/10.jpg)
© 2010 Pearson Education, Inc.
![Page 11: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/11.jpg)
© 2010 Pearson Education, Inc.
Polarization
![Page 12: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/12.jpg)
© 2010 Pearson Education, Inc.
![Page 13: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/13.jpg)
© 2010 Pearson Education, Inc.
The Electromagnetic Spectrum
![Page 14: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/14.jpg)
© 2010 Pearson Education, Inc.
3.Comparing infrared and ultraviolet, we can say
that
A. infrared has longer wavelength and higher
photon energy.
B. infrared has longer wavelength and lower
photon energy.
C. ultraviolet has longer wavelength and higher
photon energy.
D. ultraviolet has longer wavelength and lower
photon energy.
Reading Quiz
![Page 15: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/15.jpg)
© 2010 Pearson Education, Inc.
The Electromagnetic Spectrum
![Page 16: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/16.jpg)
© 2010 Pearson Education, Inc.
Answer
3.Comparing infrared and ultraviolet, we can say
that
A. infrared has longer wavelength and higher
photon energy.
B. infrared has longer wavelength and lower
photon energy.
C. ultraviolet has longer wavelength and higher
photon energy.
D. ultraviolet has longer wavelength and lower
photon energy.
![Page 17: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/17.jpg)
© 2010 Pearson Education, Inc.
The Photon Model of Electromagnetic Waves
photonE hf
-34 6.63 10 J sh
![Page 18: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/18.jpg)
© 2010 Pearson Education, Inc.
Example Problem
A gamma ray has a frequency of 2.4 1020 Hz. What is the
energy of an individual photon?
![Page 19: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/19.jpg)
© 2010 Pearson Education, Inc.
Example Problem
A typical digital cell phone emits radio waves with a
frequency of 1.9 GHz. What is the wavelength, and what is
the energy of individual photons? If the phone emits 0.60 W,
how many photons are emitted each second?
c = lf
![Page 21: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/21.jpg)
© 2010 Pearson Education, Inc.
Thermal Emission Spectrum
![Page 22: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/22.jpg)
© 2010 Pearson Education, Inc.
Hunting with Thermal Radiation
![Page 23: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/23.jpg)
© 2010 Pearson Education, Inc.
Seeing the Universe in a Different Light
![Page 24: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/24.jpg)
© 2010 Pearson Education, Inc.
The Electromagnetic Spectrum
![Page 25: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/25.jpg)
© 2010 Pearson Education, Inc.
A radio tower emits two 50 W signals, one an AM
signal at a frequency of 850 kHz, one an FM signal
at a frequency of 85 MHz. Which signal has more
photons per second?
A. The AM signal has more photons per second.
B. The FM signal has more photons per second.
C. Both signals have the same photons per
second.
Additional Questions
![Page 26: Electromagnetic Induction and Electromagnetic Wavessparkingcuriosity.net/Phys 221/EMwaves.pdf · 2017-07-17 · © 2010 Pearson Education, Inc. PowerPoint® Lectures for College Physics:](https://reader033.vdocuments.us/reader033/viewer/2022050514/5f9ed2e91b08c43834634b72/html5/thumbnails/26.jpg)
© 2010 Pearson Education, Inc.
Answer
A radio tower emits two 50 W signals, one an AM
signal at a frequency of 850 kHz, one an FM signal
at a frequency of 85 MHz. Which signal has more
photons per second?
A. The AM signal has more photons per
second.
B. The FM signal has more photons per second.
C. Both signals have the same photons per
second.