Given two 12-cm-focal-length lenses, you attempt to makea crude microscope using them. While holding these lensesa distance 55 cm apart, you position your microscope sothat its objective lens is distance d, from a small object.Assume your eye's near point N = 25 cm. (a) For your micro-scope to function properly, what should d, be? (b) Assumingyour eye is relaxed when using it, what magnification Mdoes your microscope achieve? (c) Since the length of yourmicroscope is not much greater than the focal lengths of itslenses, the approximation M = Nl/fefo is not valid. If youapply this approximation to your microscope, what % errordo you make in your microscope's true magnification?

Given The focal length of objective fo = 12 cm The focal length of eyepiece…

Answered: Given two 12-cm-focal-length lenses,…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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An object is in front of a converging lens (f = 0.35 m). The magnification of the lens is m = 2.5. (a) Relative to the lens, in what direction should the object be moved so that the magnification changes to m = -2.5? (b) Through what distance should the object be moved? (a) (b) Number i eTextbook and Media Save for Later Attempts: 0 of 5 used Units Submit Answer
Your camera’s zoom lens has an adjustable focal length ranging from 55 to 150 mm. Part (a) What is the maximum power of the lens, Pmax, in diopters? Part (b) What is the minimum power of the lens, Pmin, in diopters?
EXPERIMENT - FOCAL LENGTH OF THE GIVEN LENS Objective: (a) To investigate the properties of the given lens. (b) To investigate the images formed by the lens for various object positions. (c) To measure the focal length of the lens. Formulae: 1 1 + u 1 1 P = f V Apparatus used in this Experiment: Experimental data Physical Quantity Its Value in cm Image distance in cm 24.5 Object distance in cm 17 Answer the following: Question - 1 Among the 2 distances mentioned in the table, which distance is fixed and which is measured ? 1. Fixed distance - 2. Measured distance -
q44 What magnifying power is attained using a compound microscope with the following specifications: objective focal length 0.80 cm, eyepiece focal length 4.40 cm, tube length 15.0 cm? Assume a near point of 25.0 cm. Enter the numerical part of your answer to the nearest integer.
A patient cannot clearly see any object that lies closer than 32.0 cm to her right eye. However, the patient wishes to see objects as close as 20.0 cm with that eye. The patient requests eyeglasses to address the problem. (a) Is the patient nearsighted or farsighted? nearsightedfarsighted (b) If the eyeglass lens lies 2.10 cm in front of the patient's eye, what is the minimum distance p (in cm) separating the lens from an object she wants to see? (Give your answer to at least three significant digits.) cm (c) The patient is unable to focus clearly on anything closer than 32.0 cm to her eye (this being the patient's near point). The image formed by the eyeglass lens must therefore be 32.0 cm from the eye. How far, then, (in cm) would the image lie from the lens? (Give your answer to at least three significant digits.) cm (d) The image lies on the same side of the lens as the original object. Is the image real or virtual, and is its position q positive or…
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An office administrator realizes that she is having trouble doing her work due to eyesight problems. Her optometrist determines that without glasses she can focus clearly only on objects that lie at distances between 0.450 m and 4.00 m. The optometrist decides that the best way to handle her eyesight problems is to prescribe bifocals that will give her normal visual acuity from 25.0 cm out to infinity. After trying on several pairs of glasses frames, they agree that the glasses will be a distance of 2.20 cm from her eyes. (a) Determine the refractive power needed for the bifocal part that will correct for her nearsightedness (include the sign). D What type of lens is needed? O converging O diverging (b) Determine the refractive power needed for the bifocal part that will correct for her farsightedness (include the sign). D What type of lens is needed? O converging diverging
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 in D of the eyes of a woman who can see an object clearly at a distance of only 7.30 cm? (Assume the lens-to-retina distance is 2.00 cm.) ____D (b) What is the size in mm of an image of a 6.00 mm object, such as lettering inside a ring, held at this distance? (Include the sign of the value in your answer.) ______mm (c) What would the size of the image be in mm if the object were held at the normal 25.0 cm distance? (Include the sign of the value in your answer.) _____mm
let aperture stop == radius of lens == object height
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. This instrument places an illuminated object of known size at a known distance p from the cornea, which then reflects some light from the object, forming an image of it. The magnification M of the image is measured by using a small viewing telescope that allows a comparison of the image formed by the cornea with a second calibrated image projected into the field of view by a prism arrangement. Determine the radius of curvature of the cornea whenp = 28.0 cm and M = 0.0140.
A certain camera is able to focus on objects from 1.13 m to ∞o. Suppose you want to take an extreme close-up shot, with the camera 19 cm from the object. Find the focal length of a thin lens that could be placed directly in front of the camera lens such that the image of the close object would be in focus. (Let's denote the minimum and maximum values of the focal length by fmin and fmax, respectively.) 228 m -u I fmin = fmax = XX

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