Q. A camera in many ways is similar to the human eye, still there are some basic differences in image formation between the two. Explain.
Ans. (i) In camera, the distance between the lens and the screen can be adjusted but not the focal length of the lens. However, in eye, the ciliary muscles adjust the focal length keeping the distance between the lens and the retina constant.
(ii) The image formed on retina is temporary and its impression is recorded in brain as memory. However, the image formed on the film of camera is a permanent record.