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Concept explainers
Landing on an Aircraft Carrier The Fresnel Lens Optical Landing System (FLOLS) used to ensure safe landings on aircraft carriers consists of a series of Fresnel lenses of different colors. Each lens focuses light in a different, specific direction, and hence which light a pilot sees on approach determines whether the plane is above, below, or on the proper landing path. The basic idea behind a Fresnel lens, which has the same optical properties as an ordinary lens is shown in Figure 27-30. Suppose an object is 17.1 cm behind a Fresnel lens, and that the corresponding image is a distance d1 = d in front of the lens. If the object is moved to a distance of 12.0 cm behind the lens, the image distance doubles to d = 2d. In the FLOLS, it is desired to have the image of the lightbulb at infinity. What object distance will give this result for this particular lens?
A lens causes light to refract at its surface; therefore, the interior glass can be removed without changing its optical properties. This produces a Fresnel lens, which is much lighter than the original lens. (Problem 93)
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Chapter 27 Solutions
Modified Mastering Physics with Pearson eText -- Access Card -- for Physics (18-Weeks)
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Tutorials in Introductory Physics
- Two lenses are in a series. With an object that is viewed through them 1) Pick values for the focal lengths of the lenses (negative values are allowed for the second lens) 2) Calculate overall magnification 3) Fully characterize image (real vs. virtual, upright vs. inverted, magnified vs. reduced) 4)Show Or create ray trace diagram for the situationarrow_forwardSnell's Law nisindi nrsinor = 1. Consider water sitting on top of a pane of glass. Light passes through the water and is refracted at the water-glass surface. Calculate the angle of refraction for the light if the incident angle is 15°. The indices of refraction for water and glass are 1.33 and 1.52, respectively. Water Heat Equation Q = cmAT Glassarrow_forwardWhat is the laws of reflection and refraction? Try to draw a light path diagram to explain why the ruler appears to be bent when part of it is under the water. Explain how we can watch the 3D-movie by wearing the glasses providing by the cinema briefly.arrow_forward
- DIVERGING LENS An object measuring 15 cm in height is placed in front of a diverging lens. An upright, virtual image with a height of 8 cm is seen on the same side of the lens as the object. a) What is the magnification of the lens? b) If the object is 35 cm away, where is the image? c) Based on the above, what is the focal length of the lens? d) Starting with the object's height and distance from the lens, draw a scale diagram of the situation.arrow_forwardRay Diagrams - Diverging Lens A certain diverging lens has a focal length of 58.0 cm. If the object is 44 cm high and is situated 93 cm in front of the diverging lens, determine the following using the mirror and magnification equations: (a) Image distance (b) Magnification of the image (c) Is the image real or virtual, upright or inverted, larger or smaller. (d) Draw the Ray Diagramarrow_forwardParallel light rays cross interfaces from medium 1 into medium 2 and then into medium 3. What can we say about the relative sizes of the index of refraction of these media? a) n2 > n3 > n1 b) n2 > n1 > n3 c) n3 > n2 > n1 d) n3 > n1 > n2arrow_forward
- What was the major problem with the Hubble Space Telescope when it was first launched unto orbit? a. It's antenna wouldn't open, so the data could not be sent back to earth b. It was in the wrong orbit, so it dipped down into the Earth's thicker atmosphere regularly c. It's spectroscope broke during the launch d. The mirror's shape was slightly wrong, so all the light did not come to a single focusarrow_forwardBending Light A beam of light with a wavelength of589 nanometers traveling in air makes an angle of incidenceof 40° on a slab of transparent material, and the refractedbeam makes an angle of refraction of 26°. Find the index ofrefraction of the material.*arrow_forwardProperties of light 2. Light traveling in air is incident on the surface of a block of plastic at an angle of 62.7° to the normal and is bent so that it makes a 48.1° angle with the normal in the plastic. Find the speed of light in the plastic.arrow_forward
- Nearsightedness and Farsightedness A person with normal vision can focus on objects as close as a few centimeters from the eye up to objects infinitely far away. There exist, however, certain conditions under which the range of vision is not so extended. For example, a nearsighted person cannot focus on objects farther than a certain point (the far point), while a farsighted person cannot focus on objects closer than a certain point (the near point). Note that even though the presence of a near point is common to everyone, a farsighted person has a near point that is much farther from the eye than the near point of a person with normal vision. Both nearsightedness and farsightedness can be corrected with the use of glasses or contact lenses. In this case, the eye converges the light coming from the image formed by the corrective lens rather than from the object itself. Part A O The lens should form the image at the near point. O The lens should form the image at the far point. O The…arrow_forward2:02 AM Wed May 12 2% 4 +: 0 Example #1 Follow-Up Homework Assignment, Multiple Reflections The two figures shown are equilateral, regular, polygons with mirrored internal surfaces except for one open side. A ray of light enters the open side as shown, reflects off the internal mirrored surfaces, and eventually leaves back through the open side. For the figure below, calculate the angle at which the light ray leaves the figure (with respect to the dashed line) after multiple successive reflections. Sketch the ray's path and show how each internal angle is calculated. 2 45° 27 >arrow_forwardActivity: A glass of water sits on top of a table. You are looking down from the side of the glass to see a coin at the bottom of the glass with water. How many times the ray of light bends coming from your eyes going to the coin inside the glass. Where will the light travels fastest and the slowest and explain why.arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillUniversity Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax
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