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Chapter 24

Chapter 24. Physics A First Course. Light and Optics. Light and Optics The Physical Nature of Light. 24.1 The Electromagnetic Spectrum 24.2 Interference, Diffraction, and Polarization 24.3 Photons. Key Question: How is the color of light related to its wavelength?.

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Chapter 24

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  1. Chapter 24 Physics A First Course Light and Optics

  2. Light and OpticsThe Physical Nature of Light • 24.1 The Electromagnetic Spectrum • 24.2 Interference, Diffraction, and Polarization • 24.3 Photons

  3. Key Question: How is the color of light related to its wavelength? 24A Investigation: Optics *Students read text section 24.1 AFTER Investigation 24A

  4. 24A Investigation Topics • Use a diffraction grating to observe the spectrum of different light sources. • Find the wavelengths of different colors of light using a spectrometer. • Explain why light is a wave.

  5. Learn the relationship among the frequency. Learn how the speed of light changes in different materials. Identify the different kinds of electromagnetic waves. Chapter 24.1 Objectives and Vocabulary • electromagnetic wave • electromagnetic spectrum • radio wave • microwave • infrared light • visible light • ultraviolet light • X rays • gamma rays

  6. Wavelength and Frequency of Visible Light

  7. Speed of Light wavelength (m) c = f l speed of light 3 x 108 m/sec frequency (Hz)

  8. Recognize an interference pattern and how it is created. Understand the difference between polarized and unpolarized light. Learn about the applications of polarization. Chapter 24.2 Objectives and Vocabulary • diffraction grating • diffraction pattern • polarizer

  9. Thin slits and diffraction

  10. Key Question: How do we know light has both wave-like and particle-like qualities? 24B Investigation: Waves and Photons *Students read text section 24.3 AFTER Investigation 24B

  11. 24B Investigation Topics • Demonstrate the polarization of transverse waves. • Observe the polarization of light. • Explain why sunglasses work. • Discuss the wave-like and particle-like behavior of light.

  12. Define the term photon. Explain how energy is related to the color of light. Learn that one photon affects one electron at a time. Chapter 24.3 Objectives and Vocabulary • photoluminescence

  13. Absorbing and Emitting Light • White paper absorbs and then emits photons of all colors of light. • Black ink absorbs the photons of all colors and emits none.

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