Question

An object is 12.0 cm from a convexmirror with f = -15.0 cm. Find theimage distance.(Mind your minus signs.)(Unit = cm)

Answer 1

Given:

u = object distance = 12 cm

f = focal lenght = -15 cm

v= object distance

Apply:

1/f = 1/u + 1/v

Replacing:

`-(1)/(15)=(1)/(12)+(1)/(v)`
`-(1)/(15)-(1)/(12)=(1)/(v)`
`-(3)/(20)=(1)/(v)`