In the game of baseball, the catcher uses his fingers to send a “sign” to the pitcher, telling him what pitch to throw next (Fig. P25.55). Some center fielders claim that they can tell if a catcher shows one finger or two fingers to the pitcher. The center fielder is typically 75 m from the catcher. The Rayleigh criterion can be used to determine if the center fi elder’s resolution limit is good enough to distinguish different signs. Using the Rayleigh criterion, what is the approximate smallest resolvable separation of a catcher’s fingers?