Consider an object placed near a thin lens. The ray shown is one of the principal rays for the lens. Each square is 1 in along the horizontal direction. What is the focal length of the thin lens? (The image is drawn to scale) object optic axis lens
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- The objective lens of a microscope is a planoconvex (flat on one side) lens that has a short focal length of 7.6 mm. The focusing knob on the microscope moves the object toward or away from the objective lens. The microscope is designed so that the object will be seen in focus through the eyepiece when the objective lens forms a real image of the object 160 mm behind the objective lens. (a) At what object distance in mm is the microscope focused? (b) What is the lateral magnification of the objective lens?(c) Account for the resulting image shown in the figure, i.e. using your calculations, justify that indeed the image is real, magnified, and inverted.The figure below shows an object placed neara concave lens. A particular ray of light is shown coming from the tip of the object and going into the lens. Choose the correct path of the ray after it goes through the lens 2f D 2f D B A E 00000Is the image supposed to be real, virtual, inverted, upright?
- A coin is 12 cm in front of a converging lens with focal length of magnitude 4.0 cm. Where is the image? A) 8.0 cm behind the lens B) 6.0 cm in front of the lens C) 6.0 cm behind the lens D) 4.0 cm in front of the lensI need help please.An object 4 cm tall is placed in front of the converging lens has a focal length of 10 cm. For each situation below, locate and describe the image (type, orientation, size, and location) using a ray diagramand the lens equations if the object is placed 40 cm from the lens. 30 cm from the lens. 20 cm from the lens 15 cm from the lens 5 cm from the lens
- A sharp image of a pencil that’s 25 cm away from your eye is formed on your retina. As you move the pencil farther away from your eye, what happens to the lens of your eye in order to form a sharp image on the retina? It gets less curved, increasing its focal length It gets less curved, decreasing its focal length It does not change It gets more curved, increasing its focal length It gets more curved, decreasing its focal lengthA convex lens produces an image with a magnification of +5. Describe the locatior size, and orientation of the image produced. Circle one from each pair of answers Same side as object/ opposite side as object Upright/Inverted Real /Virtual Enlarged /Reduceda ray diagram for eyeglasses that contain a converging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm
- Some lenses are shaped with one flat side and one spherically-shaped side. This shape is designed to focus parallel light rays onto a single point. In a few sentences, explain how the spherical shape of the lens' surfaces causes parallel light rays to focus on a single point. (Assume the light is travelling through air into a lens with an index of refraction greater than that of air.) Focal length Focal pointIf the focal lengths of both the objective lens and the eyepiece were doubled in a compound microscope, what would be the change in the magnification? Question 10 options: It would increase by a factor of 4 It would increase by a factor of 2 There would be no change It would decrease None of the other responses are correct.The (converging) objective lens of a telescope has a focal length of 0.84 m. An object is located at a distance of 12m from the lens. At what distance from the objective lens is the image formed by this lens ? Give your answer in meters