Question

A camera has a lens of 150.0 mm. A woman whose height is 1.60 m is being photographed from a distance of 8.00 m. [No picture required) (a) What is the height of the woman's image on the camera's image sensor? Put your answer in mm. (b) Is the image inverted or upright?

Answer 1

Focal length=f=150 mm=0.15 m

Since the focal length is positive, the lens is convex

Object distance=u=8 m

Let image distance be v

1/u+1/v=1/f

1/8+1/v=1/0.15

v=0.153 m

Image is formed 0.153 m on the other side of lens

Let height of image be h

h=(0.153/8)*1.6=0.03057 m=30.57 mm

The image is real and inverted