COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 24, Problem 8QAP
To determine
To Explain:
why a lens made up of water act as a converging lens in the air and diverging in the acetone?
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•• (a) An object that is 3.00 cm high is placed 25.0 cm in
front of a thin lens that has a power equal to 10.0 D. Draw a ray di-
agram to find the position and the size of the image and check your
results using the thin-lens equation. (b) Repeat Part (a) if the object
is placed 20.0 cm in front of the lens. (c) Repeat Part (a) for an object
placed 20.0 cm in front of a thin lens that has a power equal to
-10.0 D. SSM
45
•• A certain telescope uses a concave spherical mirror that
has a radius equal to 8.0 m. Find the location and diameter of the
image of the moon formed by this mirror. The moon has a diameter
of 3.5 X 10°m and is 3.8 x 10* m from Earth.
31
A diverging lens always makes a reduced image. Could you use
such a lens to start a fire by focusing sunlight? Explain.
Chapter 24 Solutions
COLLEGE PHYSICS
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- Suppose you want to use a converging lens to project the image of two trees onto a screen. One tree is a distance x from the lens; the other is at 2%, as in Figure CQ23.7. You adjust the screen so that the near tree is in focus. If you now want the far tree to be in focus, do you move the screen toward or away from the lens? Figure CQ23.7arrow_forwardAn object is placed at a distance of 10.0 cm from a convex mirror of focal length 15.0 cm. Which of the following is the image formed? • dị = +6.00 cm and M = -0 600 o d = +30 0 cm and M = -3.00 o d=600 cm and M= 0 600 o di = -300 cm and M = +3.00arrow_forwardIt has become common to replace the cataract-clouded lens of the eye with an internal lens. This intraocular lens can be chosen so that the person has perfect distant vision. Will the person be able to read without glasses? If the person was nearsighted, is the power of the intraocular lens greater or less than the removed lens?•arrow_forward
- • (a) Use a ray diagram to determine the approximate location ofthe image produced by a concave lens when the object is at a distance 2∙ ƒ ∙ from the lens. (b) Is the image upright or inverted? (c) Isthe image real or virtual? Explain.arrow_forward34.15 • The thin glass shell shown in Fig. E34.15 has a spherical shape with Figure E34.15 a radius of curvature of 12.0 cm, and both of its surfaces can act as mirrors. A seed 3.30 mm high is placed 15.0 cm from the center of the mirror along the optic axis, as shown in the figure. (a) Calculate the location and height of the image of this seed. (b) Suppose now that the shell is reversed. Find the location and height of the seed's image. 3.30 mm -15.0 cmarrow_forward9- EXAMPLE 23-15 A two-lens system. Two converging lenses, A and B, with focal lengths fA in Fig. 23-44a. An object is placed 60.0 cm in front of the first lens as shown in Fig. 23-44b. Determine (a) the position, and (b) the magnification, of the final image formed by the combination of the two lenses. = 20.0 cm and fs # 25.0 cm, are placed 80.0 cm apart, as shown Lens A Lens B FB FR (а) 80.0 cm FIGURE 23-44 Two lenses, A and B, used in combination. Example 23-15. The small numbers refer to the easily drawn rays. FA FB FAIA FR OB (= 1A) doB (b)arrow_forward
- A nearsighted eye is corrected by placing a diverging lens in front of the eye. The lens will create a virtual image of a distant object at the far point (the farthest an object can be and still be in focus) of the myopic viewer where it will be clearly seen. In the traditional treatment of myopia, an object at infinity is focused to the far point of the eye. 1)If an individual has a far point of 68 cm, prescribe the correct power of the lens that is needed. (Express your answer to two significant figures.)arrow_forward• It has become common to replace the cataract-clouded lens of the eye with an internal lens. This intraocular lens can be chosen so that the person has perfect distant vision. Will the person be able to read without glasses? If the person was nearsighted, is the power of the intraocular lens greater or less than the removed lens?arrow_forward• (a) Use a ray diagram to determine the approximate location ofthe image produced by a concave lens when the object is at a distance 12 ∙ ƒ ∙ from the lens. (b) Is the image upright or inverted? (c) Isthe image real or virtual? Explainarrow_forward
- An object is placed at a distance of 10.0 cm from a convex mirror of focal length 5.00 cm. Which of the following is the image formed? • di = +3.33 cm and M = -0.333 O di = 10.0 cm and M = -1.00 O di = -3.33 cm and M = +0.333 O dj = -10.0 cm and M= +1.00arrow_forward-give 3 optical instruments (example camera, microscope). -count/give the number of lenses used in EACH particular instrument and Identify whether the lens is converging or diverging.arrow_forward•• An object is 15.0 cm in front of a converging lens that has a focal length equal to 15.0 cm. A diverging lens that has a focal length whose magnitude is equal to 15.0 cm is located 20.0 cm in back of the first. (a) Find the location of the final image and describe its properties (for example, real and inverted) and (b) draw a ray diagram to corroborate your answers to Part (a). SSM 55arrow_forward
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