Question

A convex mirror has a focal length of 3 cm. An object is placed 2 cm away from the mirror. The darkest lines on the grid represent 1 cm.

(a) Draw the ray diagram and locate the image. Label the location of the focal point F, and the center of curvature.

(b) Indicate the positive direction on the optical axis. Mark important locations on the optical axis, s, s’, f, r, and 0

(c) Indicate the magnification.

Answer 1

C - center of curvature

F - focal point

S - object

S' - image

O - pole of the mirror

r = radius of curvaure

f = focal length

v =6/5 = 1.2cm

Hence image is virtual and forms inside the mirror.

magnification, m= -v/u

= -1.2/-2 = 0.6

so diminished image is formed.

convex mirror

- = - +- mirror formula 1 1 1 f u v given, focal length, f = 3cm object distance, u =-2cm image distance, v = ? 1 1 1 v f u 1 1 1 v 3-2 1_-2-3 V -6