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How is frequency expressed?
Frequency can be applied to any kind of motion that is repetitive. It answers the question; "how frequent does the cycle repeat itself?" Then it is expressed by counting how often the motion repeats in a certain amount of time and dividing that count by the time. For example if 12 complete waves (or cycles) pass a point in 6 seconds then the frequency is 12/6 = 2 cycles/sec. The unit of 1 cycle/sec is called a Hertz so the frequency would also be expressed as 2 Hertz or 2 Hz.
Why are the units of frequency expressed in reciprocal units?
Frequency is defined as the number of repetitions made in one second. In case of pendulum the repetition is called oscillation. In case of a tuning fork, the repetition is known to be vibration. In case of a wheel, the same repetition is said to be rotation. In case of planet going around the sun, that one is named as revolution. So, the number of oscillations, vibrations, rotations, revolutions per second in known as frequency. Thus, as the number has no unit and time has second as unit we get the unit for frequency as second -1
Is frequency a scalar or vector unit?
Frequency is a scalar since it has magnitude only.
What is the standard unit of measure for frequency?
Hertz.
What is the cgs unit of frequency?
cycle/sec
