Question

A car driver uses a rear-view convex mirror of 2.5 meter focal length to see the traffic
behind. It another car is 10 meter away from the mirror find its image position,
nature and size

Answer 1

F=2.5

U=-10

V=?

1/f=1/v+1/u

1/2.5=1/v+1/-10

1/v-1/10=1/2.5

1/v=2/5+1/10

1/v=1/2

V=2

m=-v/u

m=-2/-10

m=.2

Diminished, virtual and erect.