What does the power of images mean in photography?

Interpretation of "resolution" in the tool book;

Also called resolution, resolution, analysis, resolution, resolution, resolution, resolution. The ability of a photographic system to reproduce the details of an object. Its value is usually expressed by the number of black and white line pairs with the same width in the range of 1mm, and the unit expression is line /mm (referring to the number of black lines or white lines) or line pair /mm (logarithm of black and white lines). Resolution values are measured by resolution targets with different sizes of black and white line groups.

Popular saying:

Resolution is the ability to distinguish the details of the original object. For example, the original is a piece of paper covered with many lines-there are 1 0 to 100 black lines in each square line area.

Some lenses can only recognize 10 lines, while others can recognize 100 lines. The resolution of the latter is higher than that of the former.