Concept explainers
The distance of watch’s image from the mirror and its image’s diameter.
Answer to Problem 68A
The watch’s image is 24 cm behind the mirror.
Diameter of image is 9.0 cm.
Explanation of Solution
Given:
The focal length of the concave mirror,
The diameter of the watch,
The watch’s distance from the mirror,
Formula used:
Mirror equation,
Where,
And,
Magnification,
Where,
Calculation:
Using the given values in Mirror equation, the watch’s image distance will be,
Negative sign denotes that image is formed behind the mirror.
Then, the diameter of watch’s image will be,
Conclusion:
Therefore, the image of watch is formed at a distance of
Chapter 17 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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