Question

What are the uses and principles of a Pinhole camera ?

Answer 1

Answer:

A common use of pinhole photography is to capture the movement of the sun over a long period of time. This type of photography is called solargraphy.

Pinhole cameras rely on the fact that light travels in straight lines – a principle called the rectilinear theory of light. This makes the image appear upside down in the camera. ... When the shutter is opened, light shines through to imprint an image on photographic paper or film placed at the back of the camera.