Wavelength, Frequency, and Speed (Leaving Cert Physics): Flashcards

$v = f\lambda$

$v$, measured in m/s

$f$, measured in Hz

$\lambda$, measured in metres (m)

Number of complete wave cycles passing a point per second

$T = \frac{1}{f}$

They are reciprocals of each other

Distance between two identical points on consecutive waves

$c = 3 \times 10^8$ m/s

$c = f\lambda$

Speed $c$ is constant; $f$ and $\lambda$ are inversely proportional

$f = \frac{v}{\lambda}$

Low frequency, very long wavelengths

High frequency, extremely short wavelengths

All travel at the same speed: the speed of light