A9.0 cm object is 3.0 cm from a lens, which has a focal length of –12.0 cm. what is the distance of the image from the lens? what is the height of the image? what type of lens created this image?

Answer :

Image distance = -2.4 cm

Height of image = 7.2 cm

Concave lens

Explanation :

Given that,

Height of the object, h = 9 cm

Object distance, u = 3 cm

Focal length, f = -12 cm

Using mirror's formula

v = -2.4 cm

Image distance is 2.4 cm from the lens.

Magnification,

h' = 7.2 cm

The height of the image is 7.2 cm. This shows that the image is upright.

The lens used is concave lens.

magnets not strong enough

explanation: