You are examining the eyeglass prescriptions for two different people, one of the prescriptions indicated +2.00...
You are examining the eyeglass prescriptions for two different people, one of the prescriptions indicated +2.00 D and the other -.0125 D. What are the focal lengths in centimeters (cm) for each prescription and what general type of lens is needed in each case?
Homework Answers
CASE I: P = +2.00 D
Since focal length is positive the lens needed for this case is convex lens.
CASE II: P = -0.0125 D
Since focal length is negative the lens needed for this case is concave lens.
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O (the object) stands on the common central axis of two
thin, symmetric lenses, which are mounted in the boxed regions.
Lens 1 is mounted within the boxed region closer to O,
which is at object distance p1. Lens 2 is
mounted within the farther boxed region, at distance d.
Each problem in the table refers to a different combination of
lenses and different values for distances, which are given in
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3. Consider the compound optical system shown
in the diagram, where two thin lenses of focal lengths 7.5
cm (left lens) and 8.5 cm (right lens) are separated by a
distance 32 cm.
a) If an object is placed a distance do =
15.3 cm to the left of the first lens (the left one) as
shown in the figure, how far to the right of that lens, in
centimeters, is the image formed?
b) What is the magnification of...
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Two-lens systems. In the figure, stick figure
O (the object) stands on the common central axis of two
thin, symmetric lenses, which are mounted in the boxed regions.
Lens 1 is mounted within the boxed region closer to O,
which is at object distance p1. Lens 2 is
mounted within the farther boxed region, at distance d.
Each problem in the table refers to a different combination of
lenses and different values for distances, which are given in
centimeters. The...
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