This tool converts Frequency (in Hz) to the Angular Frequency in radians per second (rad/s)
Calculator
Formula
The relationship between frequency (f) and angular frequency (ω) is straightforward and governed by the formula:
ω = 2πf
Where:
- ω is the angular frequency in radians per second.
- f is the frequency in hertz.
- π is approximately 3.14159.
This formula indicates that one complete oscillation cycle in hertz is equivalent to a 2π radian rotation in a circular motion.
Example
If you have a wave with a frequency of 50 Hz, its angular frequency would be:
ω = 2π×50 Hz = 314.16 rad/s
What is Angular Frequency?
Angular frequency, often denoted by the Greek letter omega (ω), is a scalar measure of rotation rate. It represents the rate of change of the phase of a waveform, or in a more physical sense, it indicates how rapidly a sinusoidal wave, like sound or light, oscillates as it propagates.
Angular frequency is expressed in radians per second (rad/s), contrasting with ordinary frequency, which is expressed in cycles per second, or hertz (Hz). The difference primarily lies in the unit used to express a complete cycle; angular frequency uses radians, while standard frequency uses cycles.
Practical Applications of Angular Frequency
Angular frequency is useful in various scientific and engineering disciplines:
- Electrical Engineering: Angular frequency is used in the analysis of alternating current (AC) circuits, where the sinusoidal variation of voltage and current is best described in terms of radians.
- Mechanics: In systems involving rotational motion, such as gears and turbines, angular frequency provides a clear measure of how fast these components rotate.
- Optics and Wave Mechanics: Angular frequency helps describe the propagation characteristics of waves, including light waves, sound waves, and other forms of electromagnetic radiation.