515.01 Definition 
515.10 Angles 
515.13 For how many cycles of relativeexperience timing shall we go in each angular direction before we change the angle of direction of any unique systemdescribing operation?^{2} 
(Footnote 2: Now that we understand this much, we may understand how man, consisting of a vast yet always inherently orderly complex of wave angles and line frequencies, might be scanningly transmitted from any here to there by radio.) 
515.15 Complementary Angles 
515.20 Energy 
515.31 In closest packing of spheres, frequency is the number of spaces between the balls, not the number of balls. In closest packing, frequency is equal to radius. 
515.32 Electromagnetic frequencies of systems are sometimes complex but always constitute the prime rational integer characteristic of physical systems. (See Secs. 223.41 and 400.50.) 
515.33 Wave magnitude and frequency are experimentally interlocked as cofunctions, and both are experimentally gearlocked with energy quanta. 
516.01 There are only two possible covariables operative in all design in Universe: they are the modifications of angle and of frequency. 
Fig. 516.03 
516.03 By designedly synchronized frequency of reoccurrence of their constituent event patternings, a machine gun's bullets may be projected through a given point in the rotational patterning of an airplane's propeller blades. Such purposeful synchronization of a succession of alternate occupations at a point, first by a bullet and then by a discretely angled propeller blade, and repeat, is called angle and frequency modulation; together, they avoid interferences. All physical phenomena, from the largest to the smallest, are describable as frequencies of discrete angular reoccurrence of intimately contiguous but physically discontinuous events. All physical phenomena are subject to either use or nonuse of angular and frequencymodulating interference capabilities. 
517.10 Six Interference Resultants 
Fig. 517.10 
517.101 There are six fundamentally unique patterns of the resultants of interferences. The first is a tangential avoidance, like knitting needles slipping by one another. The second is modulated noninterference, as in frequency modulation. The third is reflection, which results from a relatively direct impact and a rebound at an acute angle. The fourth, which is refraction, results from a glancing impact and an obtuse angle of deflection. The fifth is a smashup, which results in several parts of one or the other interfering bodies going away from one another in a plurality of angular directions (as in an explosion). The sixth is a goingthesameway, "criticalproximity," attraction linkup such as that established between the coordinated orbiting of Earth and Moon around the Sun. 
517.11 Summary of Interference Phenomena 
517.12

517.20 Tetrahedron of Interferences
518.01 Though lines (subvisibly spiraling and quantitatively pulsative) cannot go through the same point at the same time, they can sometimes get nearer or farther from one another. They can get into what we call "critical proximity." Critical proximity is the distance between interattracted masses^{__}when one body starts or stops "falling into" the other and instead goes into orbit around its greater neighbor, i.e., where it stops yielding at 180 degrees and starts yielding to the other at 90 degrees. (See Sec. 1009.) 
518.03 Critical proximity occurs at the precessional moment at which there is a 90 degree angular transition of interrelationship of the two bodies from a 180degree falling backin to a 90degree orbiting direction, or vice versa. (See Sec. 1009.63.) 
518.06 Critical proximity is a threshold, the absolute vector equilibrium threshold; if it persists, we call it "matter." 
Next Section: 519.00 