Final answer:
The diameter of the aperture of a single pin-hole camera is 0.2mm.
Step-by-step explanation:
The diameter of the aperture of a single pin-hole camera depends on the specific camera being used. However, based on the given options, the correct answer would be 0.2mm (option 2). It's important to note that this answer is specific to the single pin-hole camera mentioned in the question. Pinhole cameras utilize this simple opening, allowing light to pass through onto photosensitive material, creating inverted and reversed images. Experimentation with different aperture sizes influences the artistic and technical aspects of the captured images in pinhole photography.