Question

An object is placed 110 mm from a concave mirror with a focal length of 5.0 cm.

Answer 1

Approximately 92 mm.

Step-by-step explanation:

Object's distance, u = 110 mm = 11 cm

focal length of the mirror = 5 cm

Image distance, v = ?

To determine the image distance, apply the mirror's formula;

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

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

=
`(1)/(5)` -
`(1)/(11)`

=
`(11-5)/(55)`

`(1)/(v)` =
`(6)/(55)`

⇒ v =
`(55)/(6)`

= 9.166667

v = 9.2 cm

The image distance is 92 mm.