Frequency, denoted by the unit Hertz (Hz), measures the number of occurrences of a repetitive event over a given time interval. In the context of sinusoidal signals, frequency represents the number of cycles completed within one second.
Angular frequency, measured in radians per second (rad/s), is another way to express frequency. It represents the rate at which the phase angle of a periodic function changes. The relationship between angular frequency and frequency can be expressed as follows:
f (Hz) = ω (rad/s) / 2π
where:
Example:
Convert an angular frequency of 10 rad/s to Hz.
f (Hz) = 10 (rad/s) / 2π
= 1.592 Hz
Understanding the relationship between rad/s and Hz is essential in various fields, including:
Unit | Pros | Cons |
---|---|---|
Rad/s | Precise and mathematically convenient | Not as commonly used as Hz |
Hz | Industry standard, easier to understand | May not be as precise for high frequencies |
In some advanced applications, we introduce the concept of "hertium" (Ht), where:
1 Ht = 1 Hz / 2π
This unit allows for finer measurement of frequencies, enabling new possibilities in fields such as quantum mechanics and high-frequency signal processing.
Angular Frequency (rad/s) | Frequency (Hz) |
---|---|
1 | 0.1592 |
2π | 1 |
10 | 1.592 |
100 | 15.92 |
1000 | 159.2 |
Frequency Range (Hz) | Applications |
---|---|
0 - 100 | Human hearing |
50 - 60 | Power grid frequency |
1 MHz - 1 GHz | Cellular communication |
2.4 GHz - 5 GHz | WiFi networks |
>100 GHz | Millimeter-wave technology |
Angular Frequency (rad/s) | Frequency (Hz) |
---|---|
π/2 | 0.25 |
20π | 10 |
100π/3 | 16.67 |
1500π | 238.73 |
2500π/6 | 659.73 |
Frequency Range (Ht) | Applications |
---|---|
10^-20 - 10^-15 | Quantum mechanics |
10^-12 - 10^-9 | High-frequency signal processing |
10^-6 - 10^-3 | Terahertz spectroscopy |
10^-2 - 1 | Millimeter-wave imaging |
1 - 10 | High-speed digital communication |
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