Frequency is the number of oscillations which occur within a given time.
In general, the frequency produced by an oscillating body is inversely proportional to its dimensions, mass, and density. The smaller the body, the greater the number of oscillations per unit of time and the higher the frequency. The larger the body, the fewer the oscillations and the lower the frequency. A small wind-chime will produce a higher frequency than a bass drum.
When an oscillating body produces standing waves which are continuously deflected by various obstructions, the body will resonate.
The resonance of an oscillating body is determined by the number of deflections which occur until its energy diminishes. The longer the decay time of the deflected waves, the higher quality of resonance is achieved.
For example, resonances will occur in a small tidal pool when the waves acting on the surface of the water are deflected back and forth against it’s boundaries. And the resonance will increase with each deflection.
On the atomic scale, the relation between energy and frequency produces a minimum value, or so-called action constant.
The value of the action constant is indivisible and represents the smallest physical quantity, or quantum, associated with elementary particles.
The minimum energy-frequency action has a constant value of the order of 10 to-the- minus 34 erg-seconds. One erg-second has a duration of about 1 millisecond and approximates the action required to blink an eye.
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of light, it was the season of darkness, it was the spring of hope, it was the winter of despair, we had everything before us, we had nothing before us, we were all going direct to heaven, we were all going direct the other way–in short, the period was so far like the present period, that some of its noisiest authorities insisted on its being received, for good or for evil, in the superlative degree of comparison only. – Charles Dickens