Chapter 17. Wave Optics. PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition Pearson Education, Inc.
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1 Chapter 17 Wave Optics PowerPoint Lectures for College Physics: A Strategic Approach, Second Edition
2 17 Wave Optics
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5 Reading Quiz 1. All waves spread out after passing through a small enough gap in a barrier. This phenomenon is known as A. antireflection B. double-slit interference C. refraction D. diffraction
6 Answer 1. All waves spread out after passing through a small enough gap in a barrier. This phenomenon is known as A. antireflection B. double-slit interference C. refraction D. diffraction
7 Reading Quiz 2. The wave model of light is needed to explain many of the phenomena discussed in this chapter. Which of the following can be understood without appealing to the wave model? A. single-slit diffraction B. thin-film interference C. sharp-ended shadows D. double-slit interference
8 Answer 2. The wave model of light is needed to explain many of the phenomena discussed in this chapter. Which of the following can be understood without appealing to the wave model? A. single-slit diffraction B. thin-film interference C. sharp-ended shadows D. double-slit interference Slide 17-8
9 Water Waves Spread Out behind a Small Opening
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11 Light Waves Also Spread Out Behind a Very Narrow Slit
12 Young s Double-Slit Interference Experiment
13 Two source interference
14 Young s Double-Slit Interference Experiment What would you see on a wall? A. Red dot from laser B. Two red vertical lines C. Horizontal dashed line. D. Something else
15 Young s Double-Slit Interference Experiment What would you see on a wall? A. Red dot from laser B. Two red vertical lines C. Horizontal dashed line. D. Something else
16 Young s Double-Slit Interference Experiment
17 Suppose the viewing screen/wall is moved closer to the double slit. What happens to the interference fringes? A. A. They get brighter but otherwise do not change. B. They get brighter and closer together. C. They get brighter and farther apart. D. They get out of focus. E. They fade out and disappear.
18 Suppose the viewing screen/wall is moved closer to the double slit. What happens to the interference fringes? A. A. They get brighter but otherwise do not change. B. They get brighter and closer together. C. They get brighter and farther apart. D. They get out of focus. E. They fade out and disappear.
19 Young s Double-Slit Interference Experiment
20 Young s Double-Slit Interference
21 r dsin m m 0,1,2,3,... m m
22 Bright and Dark Fringes in the Double-Slit Experiment d L
23 Light of wavelength 1 illuminates a double slit, and interference fringes are observed on a screen behind the slits. When the wavelength is changed to 2, the fringes get closer together. Is 2 larger or smaller than 1? A. Larger B. Smaller
24 Light of wavelength 1 illuminates a double slit, and interference fringes are observed on a screen behind the slits. When the wavelength is changed to 2, the fringes get closer together. Is 2 larger or smaller than 1? A. Larger B. Smaller
25 What would happen if you were to shine white light on a double slit? A. You d get a horizontal dashed line of white light B. You d get a rainbow C. You d get a white dashed line with rainbow on the ends. D. Something else
26 Is wavelength which is color
27 What would happen if you were to shine white light on a double slit? A. You d get a horizontal dashed line of white light B. You d get a rainbow C. You d get a white dashed line with rainbow on the ends. A. Something else
28 Example Problem Two narrow slits 0.04 mm apart are illuminated by light from a HeNe laser (λ = 633 nm). After passing through the slits the light hits a wall 1.5 m from the slits. A. What is the distance from the center to the first (m = 1) bright fringe? B. What is the distance from the center to the fifth bright fringe? Slide 17-15
6) How wide must a narrow slit be if the first diffraction minimum occurs at ±12 with laser light of 633 nm?
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