Question

A light bulb is 3.00m from a wall. You are to use a concave mirror to project an image of the bulb on the wall, with the image 3.50 times the size of the object.

HOW FAR IS THE MIRROR FROM THE WALL?

WHAT IS THE RADIUS OF CURVATURE?

Answer 1

The magnification is given by, 3.50- v--3.50u The image distance is given by, v- 3.00 -u (-3.50)u 3.00-u 2.50u 3.00 u1.2 The distance of the mirror from the wall is v--(3.50) (-1.2)-4.2 m The focal length of the mirror is, u v 12)(42)-093 m uv 1.2+4.2 The radius of curvature of the mirror is, R-2f 2(0.93)-1.87 m