# Question: A concave mirror is constructed so that a man at

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?

## Relevant Questions

A 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?Post your question