I'm building tuning forks (for fun... why not?), and among one of the design decisions is how far apart should I place the tines (the two long prongs) from each other. I'm not entirely certain whether this has any effect at all (maybe except for very large or small lengths of separation), but is there an optimal length apart the tines should be to ensure that the tuning fork can function optimally? Does this length differ with frequency?
EDIT: As pointed out by @Keith McClary I would interpret "function optimally" as precise frequency.