Question

state the principle behind the working of q pinhole camera​

Answer 1

Answer:

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.

Answer 2

Rectilinear propagation of light

Is which in the principle of pinhole camera works.