A pinhole camera does not encompass a lens; a small circular hole lets light into the camera, which then exposes the film. For the sharpest image, light from the distant point source makes as small a spot on the film as possible. Determine the optimum size of the hole for a camera in which the film is around17 cm from the pinhole? The hole smaller than the optimum forms a larger spot since it diffract the light more. The bigger hole as well makes a bigger spot as the spot can’t be smaller than the hole itself (consider in terms of geometrical optics). Let the wavelength be 560 nm.