34. Wave Optics

Single Slit Diffraction

Textbook Question
A 20x telescope has a 12-cm-diameter objective lens. What minimum diameter must the eyepiece lens have to collect all the light rays from an on-axis distant source?
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Multiple Choice
Light from a 600 nm laser is shown through a single slit of unknown width. If a screen is placed 4.5 m behind the slit captures a diffraction patter with a central bright fringe of width 20 mm, what is the width of the single slit?
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Multiple Choice
A single slit is illuminated by coherent monochromatic light at $680 nm .$ On a screen $2 . 9 m$ behind the slit, a central bright spot is observed to have a width of $39 mm .$ What is the width of the single slit?
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Multiple Choice
A carbon dioxide laser produces $10.6 μ m$ electromagnetic waves, which pass through a circular aperture with diameter $1 . 0 mm .$ What is the approximate width of the laser beam when it strikes a target $3 . 0 m$ away?
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Multiple Choice
A single slit is illuminated by coherent monochromatic light at $680 nm$ . On a screen $2..9 m$ behind the slit, a central bright spot is observed to have a width of $39 mm$ . What is the width of the single slit?
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Multiple Choice
A single slit experiment is conducted in air using a laser at $532 nm$ and a slit width of $20 μ m$ . What happens to the fringe spacing if the entire experiment is conducted in water?
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Multiple Choice
A single slit experiment is conducted in air using a laser at $532 nm$ and a slit width of $20 μ m$ . What happens to the fringe spacing if the slit width is decreased while the distance to the screen and wavelength remain constant?
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Textbook Question
In a single-slit experiment, the slit width is 200 times the wavelength of the light. What is the width (in mm) of the central maximum on a screen 2.0 m behind the slit?
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Textbook Question
Light of 630 nm wavelength illuminates a single slit of width 0.15 mm. FIGURE EX33.22 shows the intensity pattern seen on a screen behind the slit. What is the distance to the screen?
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Textbook Question
Light of 600 nm wavelength passes through a single slit and creates a 2.0-cm-wide central maximum on a screen behind the slit. What wavelength of light will create a 3.0-cm-wide central maximum on a screen twice as far away?
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Textbook Question
Figure EX33.26 shows the light intensity on a screen behind a single slit. The wavelength of the light is 600 nm and the slit width is 0.15 mm. What is the distance from the slit to the screen?
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Textbook Question
FIGURE P33.39 shows the light intensity on a screen 2.5 m behind an aperture. The aperture is illuminated with light of wavelength 620 nm. Is the aperture a single slit or a double slit? Explain.
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Textbook Question
FIGURE P33.40 shows the light intensity on a screen 2.5 m behind an aperture. The aperture is illuminated with light of wavelength 620 nm. If the aperture is a single slit, what is its width? If it is a double slit, what is the spacing between the slits?
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Textbook Question
A radar for tracking aircraft broadcasts a 12 GHz microwave beam from a 2.0-m-diameter circular radar antenna. From a wave perspective, the antenna is a circular aperture through which the microwaves diffract. If the antenna emits 100 kW of power, what is the average microwave intensity at 30 km?
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Textbook Question
A helium-neon laser (λ = 633 nm) is built with a glass tube of inside diameter 1.0 mm, as shown in FIGURE P33.62. One mirror is partially transmitting to allow the laser beam out. An electrical discharge in the tube causes it to glow like a neon light. From an optical perspective, the laser beam is a light wave that diffracts out through a 1.0-mm-diameter circular opening. Can a laser beam be perfectly parallel, with no spreading? Why or why not?
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