Concept explainers
A dentist wants a small mirror that, when 2.00 cm from a tooth, will produce a 4.0× upright image. What kind of mirror must be used and what must its radius of curvature be?
What kind of mirror must be used and must its radius of curvature be?
Answer to Problem 12P
Solution:
The mirror is concave, and radius of curvature is 5.33 cm
Explanation of Solution
As we know only concave mirror can produce magnified image.
Formula used:
Radius of curvature,
Here, v and f are image and focal length.
Magnification,
Calculation:
Image distance from the magnification,
The focal length,
Because the focal length is positive, the focal length is concave mirror.
Radius of curvature,
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