Wavelength Calculator Formula
Understand the math behind the wavelength calculator. Each variable explained with a worked example.
Formulas Used
Wavelength
wavelength = wave_speed / frequencyWavelength (cm)
wavelength_cm = (wave_speed / frequency) * 100Variables
| Variable | Description | Default |
|---|---|---|
wave_speed | Wave Speed(m/s) | 343 |
frequency | Frequency(Hz) | 440 |
How It Works
Wavelength
Wavelength is the spatial distance between two consecutive points of equal phase on a wave.
Formula
lambda = v / f
Longer wavelengths correspond to lower frequencies when speed is constant.
Worked Example
Concert A note (440 Hz) in air at 343 m/s.
- 01lambda = v / f
- 02lambda = 343 / 440
- 03lambda = 0.7795 m
- 04lambda = 77.95 cm
Frequently Asked Questions
What is the wavelength of visible light?
Visible light ranges from about 380 nm (violet) to 700 nm (red).
How does wavelength change when a wave enters a denser medium?
The wavelength decreases because the wave slows down while frequency remains constant.
What is the wavelength of a typical FM radio signal?
FM radio broadcasts around 100 MHz, giving a wavelength of about 3 meters.
Learn More
Guide
Understanding the Electromagnetic Spectrum
A complete guide to the electromagnetic spectrum. Learn about radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, including their wavelengths, frequencies, and applications.
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Open Wavelength Calculator