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. CHAPTER OUTLINE CHAPTER RESOURCES

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 RESOURCES SECTION OUTLINE

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 RESOURCES SECTION OUTLINE

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

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

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

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

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

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

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

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 Explore images of the Sun based on different wavelengths. CLASSZONE.COM VISUALIZATION Learn more about the nature of EM waves. CHAPTER RESOURCES SECTION OUTLINE

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 CHAPTER RESOURCES SECTION OUTLINE

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 RESOURCES SECTION OUTLINE

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 CHAPTER RESOURCES SECTION OUTLINE

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 CHAPTER RESOURCES • Smooth surfaces produce regular reflection, while rough surfaces produce diffuse reflection. SECTION OUTLINE

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 CHAPTER RESOURCES SECTION OUTLINE

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. CHAPTER RESOURCES • Materials can emit, transmit, reflect, and absorb different frequencies in different amounts. SECTION OUTLINE

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 RESOURCES KEY CONCEPT SUMMARY

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 RESOURCES KEY CONCEPT SUMMARY

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 CHAPTER RESOURCES KEY CONCEPT SUMMARY

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 RESOURCES KEY CONCEPT SUMMARY

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 CHAPTER RESOURCES 4. Primary Pigments KEY CONCEPT SUMMARY

Chapter Resources Click on the items below to access resources on CHAPTER HOME Chapter Resources Image Gallery Click here to review chapter images and animations Review Game Play a fun interactive review game Animations Link to all the McDougal Littell Science animations Click on the items below to access resources on CLASSZONE.COM Content Review Review key concepts and vocabulary Audio Readings Hear chapter audio readings Resource Center Get more information on select science topics Math Tutorial Review math concepts Standardized Test Practice Practice state standardized tests BACK TO CHAPTER