Students know how to solve problems involving wavelength, frequency, and wave speed.
All waves have a velocity v (propagation speed and direction), a property that represents the rate at which the wave travels. Only periodic, sustained waves can be easily characterized through the properties of wavelength and frequency. However, most real waves are composite, meaning they can be understood as the sum of a few or of many waveforms, each with and amplitude, a wavelength, and a frequency.
Wavelength ? is the distance between and two repeating points on a periodic wave (e.g., between two successive crests or troughs in a transverse wave of between adjacent compressions or expansions [rarefactions] in longitudinal wave). Wave-length is measured in units of length.
Frequency f is the number of wavelengths that pass any point in space per second. A wave will make any particle it encounters move in regular cycles, and frequency is also the number of such cycles made per second and is often abbreviated as cycles per second. The unit of frequency is the inverse second (s-1), a unit also called the hertz (Hz).
Periodic wave characteristics are related to each other. For example:
V=f ?
Example:
What�s the wavelength frequency, and wave speed of a wave that travels 10 meters in 2 seconds?
Frequency:
f=1/T
f=1/2
Velocity:
V= ?d/ ?t
V= 10m/25
V= 5 m/s
Wavelength:
? = v/f
?= 10m/s
0.5 Hz
? = 20m
Reflection:
I think that this standard is pretty straight forward and basic enough to understand. Once given the equation this is an easy equation to place together and solve. This is one of those equations that once you are given the equations then it is really simple to substitute for the variables and to solve.