Question

on what principle does a pin hole camera work according to NCERT class 6​

Answer 1

When the shutter is opened, light shines through to imprint an image on photographic paper or film placed at the back of the camera. 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.

CBSE NCERT Notes Class 6 Physics Light Shadow and Reflection. A pinhole camera is a simple camera, without lens, in the shape of a box. One of the sides has a small hole and it produces an inverted image of the outside world at other side. The box should be painted black from outside and inside for better clarity.