• A converging lens has a focal length of 14.ô cm. For each of two objects located to the left of the lens, one at a distance of 18.0 cm and the other at a distance of 7.00 cm, determine (a) the image position, (b) the magnification, (c) whether the image is real or virtual, and (d) whether the image is erect or inverted. Draw a principal-ray diagram in each case. • Repeat the previous problem for the case in which the lens is diverging, with a focal length of magnitude 10.0 cm.

• A converging lens has a focal length of 14.ô cm. For each of two objects located to the left of the lens, one at a distance of 18.0 cm and the other at a distance of 7.00 cm, determine (a) the image position, (b) the magnification, (c) whether the image is real or virtual, and (d) whether the image is erect or inverted. Draw a principal-ray diagram in each case. • Repeat the previous problem for the case in which the lens is diverging, with a focal length of magnitude 10.0 cm.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter25: Geometric Optics

Section: Chapter Questions

Problem 47PE: (a) What is the focal length of a magnifying glass that produces a magnification of 3.00 when held...

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(a) What is the focal length of a magnifying glass that produces a magnification of 3.00 when held 5.00 cm from an object such as a rare coin? (b) Calculate the power of the magnifier in diopters. (c) Discuss how this power compares to those for store-bought reading glasses (typically 1.0 to 4.0 D). Is the magnifier's power greater, and should it be?
3. Bifocal lenses are prescribed for a patient, the components having focal length of 40cm & -300cm. • What are the new and far points of the patients eye? 4. 45 year old man can see with his left eye between 25 → 300 cm and in his right eye between 15cmo, a man has astigmatism at his left eye which requires a lens of focal length + 0.5m at axis 120°. The patient requires magnification glasses of focal length 0.25m. write the required prescription for this patient
•42 Figure 34-40 gives the lateral magnification m of an object versus the object distance p from a lens as the object is moved along the cen- tral axis of the lens through a range of values for p out to p, = 20.0 cm. What is the magnification of the ob- ject when the object is 35 cm from the lens? E 0.5 p (cm) Figure 34-40 Problem 42.
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34.40 • A diverging lens with a focal length of -48.0 cm forms a virtualimage 8.00 mm tall, 17.0 cm to the right of the lens. Determine theposition and size of the object. Is the image erect or inverted? Are theobject and image on the same side or opposite sides of the lens? Draw aprincipal-ray diagram for this situation.
•• 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 55
• (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.
• (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? Explain
•8 An object is placed against the center of a spherical mirror and then moved 70 cm from it along the central axis as the image distance i is measured. Figure 34-36 gives i versus object distance p out to P. = 40 cm. What is i for p = 70 cm? 400 -400
A camera with a 50.0 mm focal length lens is being used to photograph a person standing 8.00 m away. • How far from the lens must the film be? Provide the solution: cm
• Light is refracted as it travels from a point A in medium 1 to apoint B in medium 2. If the index of refraction is 1.33 in medium1 and 1.51 in medium 2, how much time does it take for light to gofrom A to B, assuming it travels 331 cm in medium 1 and 151 cm inmedium 2?
•• (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