An object is placed 380 cm in front of a convex mirror If th

Solution

Focal length of the mirror f = -21 cm

Distance of the object u = 38 cm

Distance of the image v = ?

From the relation ( 1/u)+(1/v) = (1/f)

                          (1/38)+(1/v) = (1/-21)

                                   (1/v) = (1/-21)-(1/38)

                                          = -0.07393

                                       v = -13.52 cm

Here negative sign indicates that the image is formed on other side of obejct placed.

The distance between the object and the final image = u + v

                                                                            = 38 cm + 13.52 cm

                                                                            = 51.52 cm