The simplest camera: the pinhole camera
a closed box + a hole on one wall + film
based on the light rays straight propagation
principle very simple (figure)
- big hole: each part of the film receives light from many parts of the vase and flowers --> no image recorded
- smaller hole: the screen restricts the light so that each part of the film receives light from a small portion of the scene
- pinhole: results a sharper but dimmer image (light intensity strongly reduced)