Explanation If a lens is used as a magnifying glass, the object is placed between the focus and the optic centre and the image is formed at the near point N of the eye, which is 25 cm for a normal eye. For a relaxed eye, the object distance may be taken equal to that of the focal length of the lens f e . The magnification m e of the eyepiece is given by the expression, m e = N f e The length L of a telescope is the sum of the focal lengths of the objective f o and the eye piece f e . L = f o + f e The focal length of the objective can be calculated using the above expression and the magnificationM of the telescope is given by the ratio of the focal lengths of the objective and the eye piece. M = − f o f e Given: The maximum length of the telescope L = 50 cm Magnification of the eyepiece M = + 5 × Near point of the eye N = 25 cm Formula: m e = N f e L = f o + f e M = −

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Chapter 25, Problem 40P

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The maximum achievable angular magnification for a telescope designed to be hand held.

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Chapter 25, Problem 39P

Chapter 25, Problem 41P

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Chapter 25 Solutions

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Ch. 25 - Prob. 1OQ Ch. 25 - Prob. 2OQ Ch. 25 - Prob. 1Q Ch. 25 - Prob. 2Q Ch. 25 - Prob. 3Q Ch. 25 - Prob. 4Q Ch. 25 - Will a nearsighted person who wears corrective...Ch. 25 - Prob. 6Q Ch. 25 - Prob. 7Q Ch. 25 - Prob. 8Q

Ch. 25 - Prob. 9Q Ch. 25 - Prob. 10Q Ch. 25 - Prob. 11Q Ch. 25 - Prob. 12Q Ch. 25 - Explain why chromatic aberration occurs for thin...Ch. 25 - Prob. 14Q Ch. 25 - Prob. 15Q Ch. 25 - Prob. 16Q Ch. 25 - Prob. 17Q Ch. 25 - Prob. 18Q Ch. 25 - Prob. 19Q Ch. 25 - Prob. 20Q Ch. 25 - The image of a nearby object formed by a camera...Ch. 25 - Prob. 2MCQ Ch. 25 - Prob. 3MCQ Ch. 25 - Prob. 4MCQ Ch. 25 - Prob. 5MCQ Ch. 25 - Prob. 6MCQ Ch. 25 - Prob. 7MCQ Ch. 25 - Prob. 8MCQ Ch. 25 - Prob. 9MCQ Ch. 25 - Prob. 10MCQ Ch. 25 - Prob. 11MCQ Ch. 25 - Prob. 12MCQ Ch. 25 - Prob. 13MCQ Ch. 25 - Prob. 1P Ch. 25 - Prob. 2P Ch. 25 - Prob. 3P Ch. 25 - Prob. 4P Ch. 25 - Prob. 5P Ch. 25 - Prob. 6P Ch. 25 - Prob. 7P Ch. 25 - Prob. 8P Ch. 25 - If a 135-mm telephoto lens is designed to cover...Ch. 25 - Prob. 10P Ch. 25 - Prob. 11P Ch. 25 - A person struggles to read by holding a book at...Ch. 25 - Prob. 13P Ch. 25 - An eye is corrected by a - 5.50-D lens, 2.0 cm...Ch. 25 - Prob. 15P Ch. 25 - Prob. 16P Ch. 25 - A person has a far point of 14 cm. What power...Ch. 25 - Prob. 18P Ch. 25 - Prob. 19P Ch. 25 - Prob. 20P Ch. 25 - Prob. 21P Ch. 25 - Prob. 22P Ch. 25 - Prob. 23P Ch. 25 - Prob. 24P Ch. 25 - Prob. 25P Ch. 25 - Prob. 26P Ch. 25 - Prob. 27P Ch. 25 - A magnifying glass with a focal length of 9.2 cm...Ch. 25 - Prob. 29P Ch. 25 - Prob. 30P Ch. 25 - Prob. 31P Ch. 25 - Prob. 32P Ch. 25 - A 7.0x binocular has 3.5-cm-focal-length...Ch. 25 - Prob. 34P Ch. 25 - 35. (II) An astronomical telescope has its two...Ch. 25 - 36. (II) A Galilean telescope adjusted for a...Ch. 25 - Prob. 37P Ch. 25 - Prob. 38P Ch. 25 - Prob. 39P Ch. 25 - Prob. 40P Ch. 25 - Prob. 41P Ch. 25 - Prob. 42P Ch. 25 - Prob. 43P Ch. 25 - Prob. 44P Ch. 25 - Prob. 45P Ch. 25 - A microscope has a 14.0x eyepiece and a 60.0x...Ch. 25 - Repeat Problem 46 assuming that the final image is...Ch. 25 - Prob. 48P Ch. 25 - The eyepiece of a compound microscope has a focal...Ch. 25 - Prob. 50P Ch. 25 - An achromatic lens is made of two very thin...Ch. 25 - Prob. 52P Ch. 25 - Prob. 53P Ch. 25 - Prob. 54P Ch. 25 - Two stars 18 light-years away are barely resolved...Ch. 25 - Prob. 56P Ch. 25 - Prob. 57P Ch. 25 - Prob. 58P Ch. 25 - Prob. 59P Ch. 25 - Prob. 60P Ch. 25 - Prob. 61P Ch. 25 - Prob. 62P Ch. 25 - Prob. 63P Ch. 25 - Prob. 64GP Ch. 25 - Prob. 65GP Ch. 25 - Prob. 66GP Ch. 25 - Prob. 67GP Ch. 25 - Prob. 68GP Ch. 25 - Prob. 69GP Ch. 25 - Prob. 70GP Ch. 25 - Prob. 71GP Ch. 25 - Prob. 72GP Ch. 25 - Prob. 73GP Ch. 25 - Prob. 74GP Ch. 25 - Prob. 75GP Ch. 25 - Prob. 76GP Ch. 25 - Prob. 77GP Ch. 25 - Prob. 78GP Ch. 25 - Prob. 79GP Ch. 25 - Prob. 80GP Ch. 25 - Prob. 81GP Ch. 25 - Prob. 82GP Ch. 25 - Prob. 83GP Ch. 25 - Prob. 84GP Ch. 25 - Prob. 85GP Ch. 25 - Prob. 86GP Ch. 25 - You want to design a spy satellite to photograph...Ch. 25 - Given two 12-cm-focal-length lenses, you attempt...Ch. 25 - Prob. 89GP

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