In wireless communication to exchange information two antennas must be tuned to the same "frequency".
What is frequency?
In physics, frequency is the quantity of waves that pass through a given point in one unit of time; it is also the quantity and vibrations that a body undergoing periodic motion undergoes in one unit of time.
Some characteristics of frequency are-
- After traveling through such a series of events or locations and reverting to its original state, a substance in periodic motion is thought to have traversed one cycle or one vibration.
- Also see angular velocity and simple harmonic motion.
- A frequency is 2 per second if the period, of time interval, necessary to accomplish one cycle of vibration is 1/2 second; is if period is 1/100 of an hour, its frequency is 100 per hour.
- The Moon rotates around Earth at a slightly higher frequency than 12 cycles each year.
- A string of a violin has a frequency of 440 vibrations and cycles per second.
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