What magnification will be produced by a lens of power -4 D (such as might be used to correctmyopia) if an object is held 26 cm away?Think & Prepare1. What kind of lens is this? What kind of image does it form? Is the image erect or inverted?2. What quantities are given to you? Can you identify them in terms of the variable namesPf, dd, hh, & M?3. What different formulae are there to calculate magnification? Can you use the information youhave to form links between the different definitions?M=(use the correct sign)

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Answered: What magnification will be produced by…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter25: Optical Instruments

Section: Chapter Questions

Problem 10P: A patient cant see objects closer than 40.0 cm and wishes to clearly see objects that are 20.0 cm...

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. (a) In a camera equipped with a 50-mm focal-length lens, the maximum distance that the lens can be from the film is 60 mm. What is the smallest distance an object can be from the camera if its image on the film is to be in focus? What is the magnification? (b) An extension tube is added between the lens and the camera body so that the lens can be positioned 100 mm from film. How close can the object be now? What is the magnification?
A patient cant see objects closer than 40.0 cm and wishes to clearly see objects that are 20.0 cm from his eye. (a) Is the patient nearsighted or farsighted? (b) If the eye-lens distance is 2.00 cm, what is the minimum object distance p from the lens? (c) What image position with respect to the lens will allow the patient to see the object? (d) Is the image real or virtual? Is the image distance q positive or negative? (e) Calculate the required focal length. (f) Find the power of the lens in diopters. (g) If a contact lens is to be prescribed instead, find p, q, and f and the power of the lens.
An individual is nearsighted; his near point is 18.0 cm and his far point is 50.0 cm. (a) What lens power is needed to correct his nearsightedness? (b) When the lenses are in use, what is this persons near point?
A patient cant see objects closer than 40.0 cm and wishes to clearly see objects that are 20.0 cm from his eye. (a) Is the patient nearsighted or farsighted? (b) If the eye-lens distance is 2.00 cm, what is the minimum object distance p from the lens? (c) What image position with respect to the lens will allow the patient to see the object? (d) Is the image real or virtual? Is the image distance q positive or negative? (e) Calculate the required focal length. (f) Find the power of the lens in diopters. (g) If a contact lens is to be prescribed instead, find p, q, and f and the power of the lens.
A small telescope has a concave mirror with a 2.00-rn radius of curvature for its objective. Its eyepiece is a 4.00 cm-focal length lens. (a) What is the telescope’s angular magnification? (b) What angle is subtended by a 25,000 km-diameter sunspot? (c) What is the angle of its telescopic image?
Suppose a 200 mm focal length telephoto lens is being used to photograph mountains 10.0 km away. (a) Where is file image? (b) What is the height of the image of a 1000 m high cliff on one of the mountains?
People who do very detailed work close up, such as jewellers, often can see objects clearly at much closer distance than the normal 25 cm. (a) What is the power of the eyes of a woman who can see an object clearly at a distance of only 8.00 cm? (b) What is 1J1e size of an image of a 1.00 mm object, such as lettering inside a ring, held at this distance? (c) What would the size of the image be if the object were held at the normal 25.0 cm distance?
(a) What is the maximum angular magnification of an eyeglass lens having a focal length of 18.0 cm when used as a simple magnifier? (b) What is the magnification of this lens when the eye is relaxed?
1. What magnification will be produced by a lens of power -3.9 D (such as might be used to correct myopia) if an object is held 26 cm away? Think & Prepare 1. What kind of lens is this? What kind of image does it form? Is the image erect or inverted? 2. What quantities are given to you? Can you identify them in terms of the variable names P, f, do, d;, ho, h; & M? 3. What different formulae are there to calculate magnification? Can you use the information you have to form links between the different definitions? M= V (use the correct sign)
A convex lens is set up on a table. On one side is an illuminated object of size 5 cm that is 28 cm from the lens. The focal length of the lens is 9 cm. 1. Where will the image be located, i.e. q (in cm)? 2. What will be the magnification? 3. Will the image be real or inverted? 4. Will the image be upright or inverted? 5. What will be the size of the image. In canvas, write only the magnitude of the size in cm. For a convex lens, 'p' and 'f' are positive.
We use a lens of focal length f = 4.8 mm in order to project an image of an object AB (height = 1.6 cm) placed at 24 mm of the lens. Determine the position and the size of the image A'B'. 1) Calculation а. Write the thin lens formula b. Use it to determine the distance between the lens and the image. Use this result in order to determine the magnification of the projection. с. d. Determine the size of the image A'B'.
Part B (work to be submitted): 1. Sunlight is observed to focus at a point 18.5 cm behind a lens. a. What kind of lens is it? b. What is the focal length of the lens? 2. A sharp image is located 3 cm behind a converging lens with a 2 cm focal length. Find the distance from the object to the lens using the thin lens equation. 3. Using the definition of lateral magnification and geometrical considerations prove Equation 3 in this week's laboratory handout (page 4).

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