Question

A small object is placed on the principal axis of a convex mirror of focal length 10cm . Determine the position of the image when the object is 15cm from the mirror.​

Answer 1

v = 6 cm

Step-by-step explanation:

We have,

A small object is placed on the principal axis of a convex mirror of focal length 10 cm. The focal length of a convex mirror is positive. So, f = +10 cm

It is required to find the position of the image when the object is 15 cm from the mirror.​ Using mirror's formula :

`(1)/(v)+(1)/(u)=(1)/(f)`

v is image distance

`(1)/(v)=(1)/(f)-(1)/(u)\\\\(1)/(v)=(1)/(+10)-(1)/((-15))\\\\v=6\ cm`

Hence, the image will formed at a distance of 6 cm form the mirror.