Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 38, Problem 40SP
Two thin lenses, of focal lengths +12 and –30 cm, are in contact. Compute the focal length and power of the combination.
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Chapter 38 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 38 - 38.15 [I] Draw diagrams to indicate qualitatively...Ch. 38 - 38.16 [I] A thin lens has a focal length of +20.0...Ch. 38 - 38.17 [I] An object is very far from the front of...Ch. 38 - 38.18 [I] You are designing a copy machine using a...Ch. 38 - 38.19 [I] Show that for a thin positive lens
Ch. 38 - 38.20 [I] Where must an object be located with...Ch. 38 - 38.21 [I] A bug on the central axis is 300 cm from...Ch. 38 - 38.22 [I] Considering the bug in the previous...Ch. 38 - 38.23 [I] Where should an object be placed in...Ch. 38 - 38.24 [I] Where should an object be placed in...
Ch. 38 - 38.25 [I] A 1.0-cm-tall object is placed in front...Ch. 38 - 38.26 [I] A 1.0-cm-tall object is placed in front...Ch. 38 - 38.27 [I] Where should a 1.0-cm-tall object be...Ch. 38 - 38.28 [I] What is the separation between the...Ch. 38 - 38.29 [I] An object on the central axis is 200 cm...Ch. 38 - 38.30 [I] We have a thin negative lens with a...Ch. 38 - 38.31 [I] Determine the nature, position, and...Ch. 38 - 38.32 [II] Determine the two locations of an...Ch. 38 - 38.33 [II] What are the nature and focal length of...Ch. 38 - 38.34 [II] Describe fully the image of an object...Ch. 38 - 38.35 [II] Compute the focal length of a lens that...Ch. 38 - 38.36 [II] A luminous object and a screen are 12.5...Ch. 38 - 38.37 [II] A plano-concave lens has a spherical...Ch. 38 - 38.38 [II] A convex-concave lens has faces of...Ch. 38 - 38.39 [II] A double convex glass lens has faces...Ch. 38 - 38.40 [II] Two thin lenses, of focal lengths +12...Ch. 38 - 38.41 [II] What must be the focal length of a...
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- Two stars that are 109km apart are viewed by a telescope and found to be separated by an angle of 105 radians. If the eyepiece of the telescope has a focal length of 1.5 cm and the objective has a focal length of 3 meters, how far away are the stars from the observer?arrow_forwardA converging lens made of crown glass has a focal length of 15.0 cm when used in air. If the lens is immersed in water, what is its focal length? (a) negative (b) less than 15.0 cm (c) equal to 15.0 cm (d) greater than 15.0 cm (e) none of those answersarrow_forwardWhat will be the angular magnification of a convex lens with the focal length 2.5 cm?arrow_forward
- A lamp of height S cm is placed 40 cm in front of a converging lens of focal length 20 cm. There is a plane mirror 15 cm behind the lens. Where would you find the image when you look in the mirror?arrow_forwardYou view an object by holding a 2.5 cm-focal length magnifying glass 10 cm away from it. How far from your eye should you hold the magnifying glass to obtain a magnification of 10 ?arrow_forwardWhat is the magnification of a magnifying lens with a focal length of 10 cm if it is held 3.0 cm from the eye and the object is 12 cm from the eye?arrow_forward
- Show that the magnification of a thin lens is given by M = di/do (Eq. 38.6). Hint: Follow the derivation of the lens makers equation (page 1233) and start with a thick lens.arrow_forwardUnder what circumstances will an image be located at the focal point of a spherical lens or mirror?arrow_forwardIf the lens of a person’s eye is removed because of cataracts (as has been done since ancient times), why would you expect an eyeglass lens of about 16 D to be prescribed?arrow_forward
- What will be the formula for the angular magnification of a convex lens of focal length f if the eye is very close to the lens and the near point is located a distance D from the eye?arrow_forwardA nearsighted man cannot see objects clearly beyond 20 cm from his eyes. How close must he stand to a mirror in order to see what he is doing when he shaves?arrow_forwardAu object of height 3.0 cm is placed at 25 cm in front of a diverging lens of focal length 20 cm. Behind the diverging lens, there is a converging lens of focal length 20 cm. The distance between the lenses is 5.0 cm. Fluid the location and size of the final image.arrow_forward
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Convex and Concave Lenses; Author: Manocha Academy;https://www.youtube.com/watch?v=CJ6aB5ULqa0;License: Standard YouTube License, CC-BY