Question

A pin-hole camera consists of a box with a small hole on one face and a piece of film, inside the box, on the opposite face. The small size of the hole acts to focus the images of distant

objects on the film. If the hole radius is 0.1 mm and the size of the (cubic) box is 1 m^3, what will the effective size of the image of a distant point source be for a wavelength of 700 nm

(size of the central maximum of the Fraunhofer diffraction pattern)?

Answer 1

The size of the image has been approximated from the size of the central maxima of the diffraction pattern.