Wave Speed Equation

📊 beginner

$$v = f\lambda$$

Speed of a wave equals frequency times wavelength.

Variables & Units

$v$

Wave speed

Unit: $\text{m/s}$

$f$

Frequency

Unit: $\text{Hz}$

$\lambda$

Wavelength

Unit: $\text{m}$

Key Information

📐 Derived From

Definition of wave motion

💡 Example

Sound wave with $f=440\,\text{Hz}$ and $\lambda=0.78\,\text{m}$: $v = 440 \times 0.78 \approx 343\,\text{m/s}$.

🔧 Applications

Acoustics, optics, seismology

⚠️ Constraints

Linear, non-dispersive media

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