You’ve entered a survival contest that will include building a crude telescope. You are given a large box of lenses. Which two lenses do you pick? How do you quickly identify them?

Q: A convex lens is set up on a table. On one side is an illuminated object of size 8 cm that is 41 cm…

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Q: Create a ray diagram for eyeglasses that contain a converging lens. Assume you are looking at a 2 cm…

A: in this question for ray diagram we use 3 rules of of refraction  then draw diagram.

Q: focal length

A: Diverging lens of focal length 0.5 m

Q: Presbyopia is the tendency to gradually become far-sighted (hyperopic) as you age. If you have…

A: A.Using lens formula, the focal length of Eye is

Q: You need to build an optical instrument that will focus a distant source of light. The more compact…

A: Convex lens and concave mirror both converge parallel rays to a focal point. Concave lens and convex…

Q: A toy insect viewer for kids consists of a plastic container with a lens in the lid. The lid is 12…

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Q: 1. An amateur astronomer has a telescope to examine distant stars and nebulae. The focal length of…

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Q: A small telescope has an objective lens of focal length 144 cm and an eyepiece of focal length 6.0…

A: We have- Focal length of the objective lens, fo=144 cm Focal length of the eyepiece, fe=6.0 cm To…

Q: An object is 25 centimeters from a converging lens with a focal length of +35 centimeters. Where is…

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Q: A convex lens is set up on a table. On one side is an illuminated object of size 5 cm that is 28 cm…

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Q: The power of the lens is -2D. What is the focal length and nature of the lens? Converging lens of…

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Q: Thin lenses. A 2 cm object is 2 cm in front of a two-lens system with focal lengths 4 cm and -4 cm,…

A: Given, Distance of the object O=2 cm (sign convention) The focal length of the first lens: f1=4 cm…

Q: A converging lens has 14.3 cm focal length, and is placed 4.5 cm behind a diverging lens. Parallel…

A: The figure is shown below

Q: A telescope has an objective lens with a focal length of 82 cm and an eyepiece with a focal length…

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Q: A plano-convex lens is made up of glass with an index of refraction equal to 1.5. Its curved surface…

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Q: The focal length of a lens in a box camera is 10 mm. The fixed distance between the lens and the…

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Q: Choose the correct statement regarding a telescope being used to look at Venus.  If the focal…

A: The planets can be seen through the instrument telescope. It magnifies the image of the planets. Its…

Q: You are working in an optical research laboratory. Your supervisor requests that you build her a…

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Q: 1. You have a thin lens of focal length 50 mm. a. The object is 100 mm to the left of the lens.…

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Q: The Yerkes refracting telescope has a 1-m diameter objective lens of focal length 21 m and an…

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Q: In order to start a fire, a camper turns a lens toward the sun to focus its rays on a piece of wood.…

A: Focal length, f = 10 cm

Q: lens with a 0.98 meter focal length is placed right in front of a -3.6 meter focal length.  A small…

A: Magnification = size of image / size of object Magnification produced by lens system is equal to…

Q: Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm…

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Q: A lens grinder wants to make a plane-convex lens with the radius of curvature 0.44 m and the focal…

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Q: A biconvex lens is made of glass of refractive index 1.50. The radii of curvature of the surfaces…

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Q: The focal length of a simple lens depends on the color (wavelength) of light passing through it.…

A: focal length of the lens can be given evaluated  by the formula  1f=μ21-11R1-1R2 where μ is the…

Q: where is image formed  Is the image real or virtual  what is the focal length of the lens  are…

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Q: Problem 8: The objective lens of the refracting telescope at the Lick Observatory in California has…

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