An object is placed at a distance of 10 cm from a convex mirrior of focal length 15 cm. Find the position and nature of the image.

Explanation

Focal length of convex lens mirror, f=+15cm Object distance,
u=-10cm According to the mirror formula
`1/v-1/u=1/f`
`1/v=1/f-1/u`
`=1/(15)+1/(10)=(25)/(150)`
The positive value of v indicates that the image is formed behind the mirror.
Magnification, `m=("Image distance")/("Object distance")=-v/u=(-6)/(10)=+0.6`
The positive vaJue of magnification indicates that the image formed is virtual and erect