Final answer:
To separate print jobs by page ranges, the user should adjust the 'page range' setting. Raleigh's criterion can be used to find the minimum separation between dots for a laser printer such that the eye cannot resolve individual dots.
Step-by-step explanation:
To ensure that pages 1-10 are separated from pages 11-20 when printed, the user should adjust the page range setting in the print job settings. This will allow the user to specify exactly which pages they want to print in a particular job, thereby separating them as required.
In the context of a laser printer and the quality of the print such that individual dots are not resolvable to the human eye, we can refer to Raleigh's criterion to determine the minimum separation of two dots. Given the pupil of the eye is 3.0 mm and the viewing distance is 35 cm, we can calculate the minimum separation using the formula for Raleigh's criterion, which relates the angle under which two points can just be resolved to the wavelength of light and the diameter of the lens or pupil.
However, to translate this separation into dots per inch (dpi), we would need to calculate the inverse of the separation (since dpi measures how many dots fit into one inch) and convert the units from meters to inches.