1. Light 13.1 Light is an electromagnetic wave. 13.2
CHAPTER
NEW CHAPTER
Light
the BIG idea
Visible light is a small band of the electromagnetic spectrum.
13.1
Light is an electromagnetic wave.
13.2
Light is produced in different ways.
13.3
Light interacts with materials.
13.4
Color comes from light.
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2. 13.1 CALIFORNIA Content Standards Light is an electromagnetic wave.
7.6.a Students know visible light is a small band within a very broad electromagnetic spectrum.
7.6.b Students know that for an object to be seen, light emitted by or scattered from it must be detected by the eye.
electromagnetic wave
radiation
absorb
electromagnetic spectrum
CHAPTER
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SECTION
OUTLINE

3. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travel at the speed of light in a vacuum.
electromagnetic wave
radiation
absorb
electromagnetic spectrum
CHAPTER
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SECTION
OUTLINE

4. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
absorb
electromagnetic spectrum
Radio Waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

5. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
microwaves
absorb
electromagnetic spectrum
Radio Waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

6. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
microwaves
absorb
infrared light
electromagnetic spectrum
Radio Waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

7. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
microwaves
absorb
infrared light
electromagnetic spectrum
visible light
Radio Waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

8. Light is an electromagnetic wave.
13.1
Light is an electromagnetic wave.
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
ultraviolet light
microwaves
absorb
infrared light
electromagnetic spectrum
visible light
Radio Waves
Microwaves
Infrared Light
Visible Light
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

9. Light is an electromagnetic wave
13.1
Light is an electromagnetic wave
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
ultraviolet light
microwaves
x-rays
absorb
infrared light
electromagnetic spectrum
visible light
Radio Waves
Microwaves
Infrared Light
Visible
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

10. Light is an electromagnetic wave
13.1
Light is an electromagnetic wave
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
ultraviolet light
microwaves
x-rays
absorb
infrared light
gamma rays
electromagnetic spectrum
visible light
Radio Waves
Microwaves
Infrared Light
Visible
Ultraviolet Light
X-rays
Gamma Rays
Frequency in Hertz (1 hertz = 1 wavelength/second)
CHAPTER
RESOURCES
SECTION
OUTLINE

11. Light is an electromagnetic wave
13.1
Light is an electromagnetic wave
Visible light and other electromagnetic (EM) radiation travels at the speed of light in a vacuum.
electromagnetic wave
The EM spectrum is divided into:
radiation
radio waves
ultraviolet light
microwaves
x-rays
absorb
infrared light
gamma rays
electromagnetic spectrum
visible light
VISUALIZATION
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VISUALIZATION
Learn more about the nature of EM waves.
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12. Light is produced in different ways.
13.2
Light is produced in different ways.
CALIFORNIA
Content Standards
7.6.b Students know that for an object to be seen, light emitted by or scattered from it must be detected by the eye.
7.6.e Students know that white light is a mixture of many wavelengths (colors) and that retinal cells react differently to different wavelengths.
emit
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OUTLINE

13. Light is produced in different ways.
13.2
Light is produced in different ways.
• Incandescent matter emits light of different frequencies according to its temperature.
emit
• Matter can convert different forms of energy into EM radiation. The energy can come from chemical
reactions, charged particles (such as in electric currents), radiation, and other sources.
CHAPTER
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OUTLINE

14. Light interacts with materials.
13.3
Light interacts with materials.
CALIFORNIA
Content Standards
7.6.c Students know light travels in straight lines if the medium it travels through does not change.
7.6.f Students know light can be reflected, refracted, transmitted, and absorbed by matter.
reflect
transmit
diffuse
refract
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15. Light interacts with materials.
13.3
Light interacts with materials.
• Light travels in straight lines unless the medium changes.
reflect
transmit
• Absorption, transmission, and reflection are ways light interacts with matter.
diffuse
• Opaque objects reflect or absorb light, while translucent materials scatter light.
refract
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• Smooth surfaces produce regular reflection, while rough surfaces produce diffuse reflection.
SECTION
OUTLINE

16. 13.4 CALIFORNIA Content Standards Color comes from light.
7.5.g Students know how to relate the structures of the eye and ear to their functions.
7.6.b Students know that for an object to be seen, light emitted by or scattered from it must be detected by the eye.
7.6.e Students know that white light is a mixture of many wavelengths (colors) and that retinal cells react differently to different wavelengths.
retina
rod cell
cone cell
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17. 13.4
Color comes from light.
retina
rod cell
cone cell
• You see color when your brain combines signals from the red, green, and blue cones in your eyes.
• Most colors are combinations of frequencies.
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• Materials can emit, transmit, reflect, and absorb
different frequencies in different amounts.
SECTION
OUTLINE

18. 13.1 Light is an electromagnetic wave.
I. Light is an electromagnetic wave.
electromagnetic wave
A. An electromagnetic wave is a disturbance in a field.
radiation
1. EM Waves in a Vacuum
absorb
2. Speed of EM Waves
electromagnetic spectrum
3. Light, Waves, Rays and Particles
4. The Electromagnetic Spectrum
CHAPTER
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KEY CONCEPT
SUMMARY

19. 13.1 Light is an electromagnetic wave.
I. Light is an electromagnetic wave.
electromagnetic wave
B. EM waves have a wide range of frequencies.
1. Radio Waves
radiation
2. Microwaves
absorb
3. Infrared Radiation
electromagnetic spectrum
4. Visible Light
5. Ultraviolet Light
6. X-Rays
7. Gamma Rays
CHAPTER
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KEY CONCEPT
SUMMARY

20. Light is produced in different ways.
13.2
Light is produced in different ways.
II. Light is produced in different ways.
emit
A. Matter can produce light.
B. Light is produced by hot matter.
C. Light can be produced from different sources of energy.
1. Chemical Reactions
2. Charged Particles and Radiation
3. Other Sources of Energy
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KEY CONCEPT
SUMMARY

21. Light interacts with materials.
13.3
Light interacts with materials.
III. Light interacts with materials.
reflect
A. Light can interact with matter.
transmit
B. Matter can absorb or transmit light.
diffuse
1. Scattering
refract
2. Refraction
C. Matter can reflect light.
CHAPTER
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KEY CONCEPT
SUMMARY

22. 13.4 Color comes from light. IV. Color comes from light.
retina
A. Humans use their eyes and brains to detect and perceive color.
rod cell
cone cell
1. Properties of Light
2. Properties of the Eye
B. Humans see primary colors and mixtures.
1. Primary Colors of Light
2. Color Transmission
3. Color Reflection and Absorption
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4. Primary Pigments
KEY CONCEPT
SUMMARY

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