Final answer:
To assess if print darkness is acceptable, compare the index to a threshold of 2.0; greater than or equal to 2.0 is satisfactory. Separately, using the Raleigh's criterion, the minimum dot separation for a laser printer to prevent individual dot detection can be calculated.
Step-by-step explanation:
To determine whether the darkness of a print is acceptable, we simply compare the quantitative index given to a threshold value. In this case, if the index is greater than or equal to 2.0, the darkness is acceptable, while an index less than 2.0 indicates that the print is too light. Furthermore, to address the question regarding the laser printer dot separation, we can use Raleigh's criterion. Given the pupil size of 3.0 mm and a viewing distance of 35 cm, we could calculate the minimum separation between two dots for them to become unresolvable to the human eye, and from there convert this separation into dots per inch (dpi).