Frequency and Period
Learning Objectives
- Students will be able to define and measure frequency and period
- Students will be able to convert between frequency and period using f = 1/T
- Students will be able to identify frequency of oscillations in various systems
Core Concepts
- frequency
- period
- hertz
- cycles_per_second
- reciprocal_relationship
Formulas
$$f = \frac{1}{T}$$
Frequency equals inverse of period
$$T = \frac{1}{f}$$
Period equals inverse of frequency
Units
| hertz | Hz |
| second | s |
Interesting Fact
Infrasound (below 20 Hz) and ultrasound (above 20,000 Hz) are inaudible to humans but used for sonar and medical imaging
Key Scientist
Heinrich Hertz
First to measure electromagnetic waves; unit of frequency named after him
Modern Research
Frequency analysis (Fourier transforms) is central to signal processing, medical imaging, and telecommunications.
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