A concave mirror is constructed so that a man at a distance of 20 cm from the mirror sees his image magnified 2.5 times. What is the radius of curvature of the mirror?
Answer to relevant QuestionsA child looks at a reflective Christmas tree ball ornament that has a diameter of 9.0 cm and sees an image of her face that is half the real size. How far is the child’s face from the ball? A pill bottle 3.0 cm tall is placed 12 cm in front of a mirror. A 9.0-cm-tall upright image is formed. (a) The mirror is (1) convex, (2) concave, (3) flat. Explain. (b) What is its radius of curvature? If you hold a 900-cm2 square plane mirror 45 cm from your eyes and can just see the full length of an 8.5-m flagpole behind you, how far are you from the pole? An object is placed in front of a concave lens whose focal length is – 18cm. Where is the image located and what are its characteristics, if the object distance is (a) 10 cm and (b) 25 cm? Sketch ray diagrams for each ...(a) For a convex lens, what is the minimum distance between an object and its image if the image is real? (b) What is the minimum distance if the image is virtual?
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