Experiment
To measure the resolving power of the eye two close together objects are viewed close to the eye, the distance between the eye and the objects is then increased until they can no longer be seen as two separate lines. A commonly used variation of this (Stokes H.T.) is to use a series of lines and decide at what distance they appear to be continuous. Fig.5 shows an example of this. As the page is moved from the eye, at...