3&4 Telescopes3. A telescope has an objective lens with a focal length of 84 cm and an eyepiece with a focallength of 2.6 cm. What is the magnification of this telescope? What is the length of thetelescope when adjusted for a relaxed eye?4. An astronomical telescope has two lenses spaced 84.0 cm apart. If the objective lens has a focallength of 79.5 cm then what is the magnification of the telescope?

3. Step 1: Given, fo=84cm, fe=2.6 cm Step 2: Substitute fo and fe in the formula M=fefo and…

Answered: Telescopes 3. A telescope has an…

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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1. An amateur astronomer has a telescope to examine distant stars and nebulae. The focal length of the main objective lens of the telescope is f= 710 mm. At what distance from the lens will a distant star be imaged using this objective lens? Give your answer in units of metres.
1. You have a thin lens of focal length 50 mm. a. The object is 100 mm to the left of the lens. Where is the image located (that is, what is the image distance q, including sign - express in millimeters)? Is the image real or virtual? What is the magnification? b. The object is 1 meter to the left of the lens. Where is the image located (that is, what is the image distance q, including sign - express in millimeters)? Is the image real or virtual? What is the magnification? c. The object is 20 mm to the left of the lens. Where is the image located (that is, what is the image distance q, including sign - express in millimeters)? Is the image real or virtual? What is the magnification?
Problem 8: The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft. a. What is the refractive power of this lens? b. What focal length (mm) eyepiece would give a magnification of 1000X for this telescope?
A convex lens is set up on a table. On one side is an illuminated object of size 8 cm that is 41 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.
The Yerkes refracting telescope has a 1-m diameter objective lens of focal length 21 m and an eyepiece of focal length 2.0 cm. What is the magnification of the planet Mars as seen through this telescope? Blank 1. Calculate the answer by read surrounding text.
10. A small telescope has an objective lens of focal length 144 cm and an eye-piece of focal length 6.0 cm. What is the magnifying power of the telescope? What is the separation between the objective and the eye-piece?
Q5: A refracting telescope has the objective lens of focal length (10 m). Assume it is used with an eyepiece of focal length (2 cm). What is the magnification of this telescope?
A refracting telescope has a 0.988 m diameter objective lens with focal length 8.35 m and an eyepiece with focal length 2.43 cm. What is the angular magnification of the telescope? Describe the final image. 1. None of these. 2. erect and real 3. erect and virtual 4. inverted and real 5. inverted and virtual
The objective lens of the refracting telescope at the Lick Observatory in California has a focal length of 57 ft.a. What is the refractive power of this lens?b. What focal length (mm) eyepiece would give a magnificationof 1000× for this telescope?
10. I want to build a telescope with lenses of focal lengths 20 cm and 1 cm. a. Which lens is most appropriate as the eyepiece (the one you look into)? Why? b. What should be the spacing between the lenses when I focus at a distant (treat as infinity) object? c. If I try to look at a closer object (say a bird in a tree), this means d. for the objective (first lens) is smaller, so d, for this same lens must now be longer. This means to focus on a closer object, I must increase the spacing between the two lenses. I make my telescope so I can lengthen the distance between the lenses by 2 cm. What is the closest object can I focus on?
Tracing. Consider an object placed near a thin lens. The ray shown is one of the principal rays for the lens. Each square is 1 [cm] along the horizontal direction. What is the focal length of the thin lens? (The image is drawn to scale) object optic axis 22 lens O A. +3 [cm] OB. -3 [cm] O C. +4 [cm] OD. -4 [cm]
A 1.38 m-long Galilean telescope has an eyepiece lens with focal length -4.58 cm. Determine the lens power of the telescope. Give your answer in m-1, correct to 2d.p. The answer is NOT 0.70 or 0.75

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