Question

what is the use of pin whole camera?

Answer 1

it is more often used without a translucent screen for pinhole photography with photographic film or photographic paper placed on the surface opposite to the pinhole aperture. A common use of pinhole photography is to capture the movement of the sun over a long period of time.

Answer 2

a pin hole camera is a simple camera with out a lens but a tiny aperture, a pinhole effectively a light proof box with a small hole one side.