Question

State the principal of pin hole camera?

Answer 1

Answer:

Pinhole cameras rely on the fact that light travels in straight lines – a principle called the rectilinear theory of light. ... 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

The principle of pinhole camera is rectilinear propagation of light. it it is small cuboidal box, which has a pin-sized hole on one side. The opposite side has translucent screen of ground glass and greased papers. when a lighted candle is placed in the front of the hole, inverted image of candle flame in seen on the screen.