| 92. Focusing Distance For a camera with a lens of fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens, where F, x, and y are related by 11 1 y (See the figure.) Suppose the camera has a 55-mm lens (F = 55). (a) Express y as a function of x, and graph the function. (b) What happens to the focusing distance y as the object moves far away from the lens? (c) What happens to the focusing distance y as the object moves close to the lens?
| 92. Focusing Distance For a camera with a lens of fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens, where F, x, and y are related by 11 1 y (See the figure.) Suppose the camera has a 55-mm lens (F = 55). (a) Express y as a function of x, and graph the function. (b) What happens to the focusing distance y as the object moves far away from the lens? (c) What happens to the focusing distance y as the object moves close to the lens?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.5: Graphs Of Functions
Problem 35E
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The Doppler Effect As a train moves toward an observer (see
the figure), the pitch of its whistle sounds higher to the
observer than it would if the train were at rest, because the
crests of the sound waves are compressed closer together. This
phenomenon is called the Doppler effect. The observed pitch
P is a function of the speed √ of the train and is given by
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