A convex lens produces a real, inverted image of an object that is magnified 2.5 times when the object is 20 cm from the lens. What are the image distance and the focal length of the lens?
Answer to relevant QuestionsA convex lens has a focal length of 0.12 m. Where on the lens axis should an object be placed in order to get (a) A real, magnified image with a magnification of 2.0 and (b) A virtual, magnified image with a magnification ...An object 5.0 cm tall is 10 cm from a concave lens. The resulting virtual image is one-fifth as large as the object. What is the focal length of the lens and the image distance? To correct hyperopia (farsightedness), convex lenses are prescribed. If a senior citizen can read a newspaper only when he holds it no closer than 50 cm away, what focal length of lens should be prescribed so he can read ...A plastic convex meniscus (Fig. 23.14) contact lens is made of plastic with an index of refraction of 1.55. The lens has a front radius of 2.50 cm and a back radius of 3.00 cm. (a) The signs of R1 and R2 are (1) +, +, (2) ...A method of determining the focal length of a diverging lens is called auto collimation. As Fig. 23.30 shows, first a sharp image of a light source is projected onto a screen by a converging lens. Second, the screen is ...
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