93) A simple refracting telescope provides large magnification by employingA) a short focal length objective and a short focal length eyepiece.B) a short focal length objective and a long focal length eyepiece.C) a long focal length objective and a short focal length eyepiece.D) a long focal length objective and a long focal length eyepiece.94) A farsighted boy has a near point at 2.3 m and requires contact lenses to correct his vision tothe normal near point. What is the correct choice of lens power for the contact lenses?A) -0.28 dioptersB) +0.28 dioptersC) -3.6 dioptersD) +3.6 dioptersE) +1.8 diopters

93. The relationship of magnification and focal length of objective is directly proportional while…

Answered: 93) A simple refracting telescope…

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 inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 46.5 cm long tube. If the eyepiece has a focal length of 1.70 cm, calculate the required focal length in cm of the objective lens and the angular magnification of the telescope. HINT (a) the required focal length in cm of the objective lens cm (b) the angular magnification of the telescope
A microscope in the lab uses a lens with a focal length of 8.0 mm and an eyepiece with a focal length of 18 mm. The distance between the lens and the eyepiece is 19.7 cm. We use the microscope so that the eyes focus as if the object were placed infinitely far away. We treat the lenses as if they were "thin". a) How much distance must there be between the object and the lens when using the microscope?
If the eyepiece of a telescope is replaced with an eyepiece with a focal length twice as long, the magnifying power is a. four times greater. b. two times greater. c. four times less. d. two times less.
* 32. Use ray diagrams to locate the images of the following objects: (a) an object that is 10 cm from a convex lens of +15-cm focal length and (b) an object that is 10 cm from a concave lens of -15-cm focal length. (c) Calculate the image locations for parts (a) and (b) using the thin lens equation. Check for consistency.
3. Two converging lenses above are placed 20.0 cm apart, both with focal lengths of 10.0 cm. A candle is 30 cm away from the first lens. By means of a neat ray tracing, locate the final image formed by the combination of the two lenses. b) Use mathematics to fully describe the image created by the lenses.
3. A cell phone has a fixed focal length lens of f = 3.85 mm = 0.00385 m and can take pictures over a range of distances from S. = 0.5 m to S,= infinity. Over what range of distances (S₁) does the lens in the cellphone have to move to focus an image at these two extremes in object distance?
A person with a normal near point (25 cm) using a compound microscope with objective of focal length 8.0 mm and an eyepiece of focal length 2.5cm can bring an object placed at 9.0mm from the objective in sharp focus. What is the separation between the two lenses? Calculate the magnifying power of the microscope,
2) A light bulb is 50 cm to the left of a convex lens of focal length 25 cm. The lens is placed 75 cm to the left of a convex mirror of focal length 20 cm. Light will travel from the bulb, through the convex lens to create an image. This image will then become the object for the concave mirror. The concave mirror will form the final image of the lightbulb. a) Where does the convex lens form an image of the lightbulb (relative to the lens)? b) What is the distance from the mirror to the image from the lens (hint: this will be the object distance in part c)? c) Where is the final image formed with respect to the mirror? d) Is the final image real or virtual? note: please answer all question i will definitely upvote.
4. Your Aunt Sonia has vision with a near point of 65 cm and a far-point of . Calculate the: a) focal length, and b) Lens Power, of corrective optics (glasses) that you should get for her at the drug store so that objects placed at the normal near point (25 cm) will be in focus. Assume that both eyes need the same correction and that the lenses will be placed 2 cm in front of her eyes. (Hint: for an object placed at the normal near point, the lens must form an image of the object at her near point).
An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 48.0 cm long tube. If the eyepiece has a focal length of 1.60 cm, calculate the required focal length in cm of the objective lens and the angular magnification of the telescope. HINT (a) the required focal length in cm of the objective lens cm (b) the angular magnification of the telescope

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