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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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IP A camera with a 55-mm-focal-length lens has aperture

Chapter 27, Problem 8P

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QUESTION:

Problem 8P

IP A camera with a 55-mm-focal-length lens has aperture settings of 2.8, 4, 8, 11, and 16. (a) Which setting has the largest aperture diameter? (b) Calculate the five possible aperture diameters for this camera.

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QUESTION:

Problem 8P

IP A camera with a 55-mm-focal-length lens has aperture settings of 2.8, 4, 8, 11, and 16. (a) Which setting has the largest aperture diameter? (b) Calculate the five possible aperture diameters for this camera.

ANSWER:

Step 1 of 3

(a)

Here we need to find the setting in which the value of the aperture diameter is largest among the given sets.

The  is given by,

                                        ………..1

Where  is the aperture diameter and is the focal length.

Since in all the settings focal length remains same, the diameter will be inversely proportional to the . Hence, smaller the greater the aperture diameter.

From the given sets, camera with  will have greater aperture diameter.

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