Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 16, Problem 20CQ
To determine
Check whether the light from an antireflection coating of eyeglass undergo constructive or destructive interference.
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A very thin oil film (n=1.25) floats on water (n=1.33). What is the thinnest film (but not zero) that produces a strong reflection for green light with a wavelength of 500 nm?Express your answer in nanometers.
6. A glass lens is protected by a thin film coating is pasted on the lens. There are two choices of film with refractive index 1.350 and 1.675. Which colour will be seen on the reflected interference spectrum. The coating has a thickness of 340nm. the glass has an index of refraction n = 1.480nm
Explain how a thin film of refractive index n can be used as an antireflective coating on a glass lens with refractive index ng. Give the equations that describe the destructive interference condition for the two main reflected light components.
Chapter 16 Solutions
Physics of Everyday Phenomena
Ch. 16 - What characteristic of the electromagnetic waves...Ch. 16 - Prob. 2CQCh. 16 - Is it possible for an electromagnetic wave to...Ch. 16 - For which of the following characteristicsspeed,...Ch. 16 - Prob. 5CQCh. 16 - What is the color of light with a wavelength of...Ch. 16 - Prob. 7CQCh. 16 - Prob. 8CQCh. 16 - Prob. 9CQCh. 16 - A color TV uses red, green, and blue phosphors to...
Ch. 16 - Skylight is produced by the scattering of the suns...Ch. 16 - Prob. 12CQCh. 16 - Prob. 13CQCh. 16 - Prob. 14CQCh. 16 - If two waves start out in phase with each other,...Ch. 16 - Prob. 16CQCh. 16 - Prob. 17CQCh. 16 - Prob. 18CQCh. 16 - Prob. 19CQCh. 16 - Prob. 20CQCh. 16 - Why do lenses with a reflective coating appear to...Ch. 16 - Prob. 22CQCh. 16 - Prob. 23CQCh. 16 - Prob. 24CQCh. 16 - Prob. 25CQCh. 16 - Prob. 26CQCh. 16 - Can a wave on a guitar string be polarized?...Ch. 16 - Prob. 28CQCh. 16 - Prob. 29CQCh. 16 - Prob. 30CQCh. 16 - Prob. 31CQCh. 16 - Prob. 32CQCh. 16 - Microwaves used in microwave ovens often have a...Ch. 16 - What is the wavelength of the radio waves from a...Ch. 16 - Prob. 3ECh. 16 - Prob. 4ECh. 16 - Light with a wavelength of 700 nm (7 107 m) is...Ch. 16 - Prob. 6ECh. 16 - An orange fringe produced by double-slit...Ch. 16 - Violet light of 425 nm is reflected from a thin...Ch. 16 - An antireflection coating is designed with a...Ch. 16 - Light with a wavelength of 480 nm (4.8 107 m)...Ch. 16 - Prob. 11ECh. 16 - A diffraction grating has 2200 slits or lines...Ch. 16 - Prob. 13ECh. 16 - When passed through a diffraction grating with a...Ch. 16 - Prob. 1SPCh. 16 - Prob. 2SPCh. 16 - Prob. 3SPCh. 16 - A certain soap film has an index of refraction...
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- 5. Two waves must have the same amplitude in opposite directions. A. INTERFERENCE OF LIGHT B. Constructive Interference C. Destructive Interference D. Characteristics of Coherent Sources 6. Real life example of Constructive Interference A. Light reflected from a film of oil floating on water. B. Laser C. Mirror D. Butterflies 7. Real life example of Coherence source. A. Light reflected from a film of oil floating on water. B. Laser C. Mirror D. Butterfliesarrow_forwardWhat is the minimum thickness of a soap-bubble film (n = 1.33) that will result in constructive interference in the reflected light if the film is illuminated by light with wavelength 602 nm? Now assume that the soap bubble film is on top of a glass slide (n=1.50). What is the minimum thickness for constructive interference? Give your answer in nm.arrow_forwardConsider the double-slit arrangement shown in Figure P37.60, where the slit separation is d and the distance from the slit to the screen is L. A sheet of transparent plastic having an index of refraction n and thickness t is placed over the upper slit. As a result, the central maximum of the interference pattern moves upward a distance y Find y.arrow_forward
- Sound with a frequency 650 Hz from a distant source passes through a doorway 1.10 m wide in a sound-absorbing wall. Find (a) the number and (b) the angular directions of the diffraction minima at listening positions along a line parallel to the wall.arrow_forwardA wide beam of laser light with a wavelength of 632.8 nm is directed through several narrow parallel slits, separated by 1.20 mm, and falls on a sheet of photographic film 1.40 m away. The exposure time is chosen so that the film stays unexposed everywhere except at the central region of each bright fringe. (a) Find the distance between these interference maxima. The film is printed as a transparency; it is opaque everywhere except at the exposed lines. Next, the same beam of laser light is directed through the transparency and allowed to fall on a screen 1.40 m beyond. (b) Argue that several narrow, parallel, bright regions, separated by 1.20 mm, appear on the screen as real images of the original slits. (A similar train of thought, at a soccer game, led Dennis Gabor to invent holography.)arrow_forwardA spacer is cut from a playing card of thickness 2.90 104 m and used to separate one end of two rectangular, optically flat. 3.00-cm long glass plates with n = 1.55, as in Figure P24.24. Laser light at 594 nm shine straight down on the top plate. The plates have a length of 3.00 cm. (a) Count the number of phase reversals for the interfering waves. (b) Calculate the separation between dark interference Kinds observed on the lop plate.arrow_forward
- Suppose Youngs double-slit experiment is performed in air using red light and then the apparatus is immersed in water. What happens to the interference pattern on the screen? (a) It disappears. (b) The bright and dark fringes stay in the same locations, but the contrast is reduced. (c) The bright fringes are closer together. (d) The bright fringes are farther apart. (e) No change happens in the interference pattern.arrow_forwardConsider a light wave passing through a slit and propagating toward a distant screen. Figure P37.53 shows the intensity variation for the pattern on the screen. Give a mathematical argument that more than 90% of the transmitted energy is in the central maximum of the diffraction pattern. Suggestion: You are not expected to calculate the precise percentage, but explain the steps of your reasoning. You may use the identification 112+132+152+=28 Figure P37.53arrow_forward
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