Answer:
Wavelength: the distance between two crests of an electromagnetic wave
Frequency: the rate at which electromagnetic waves oscillate
Step-by-step explanation:
For a transverse wave (such as the electromagnetic waves), we can define the following quantities:
Wavelength: it corresponds to the distance between two consecutive crests (or between two consecutive troughs) of the wave
Frequency: the number of complete oscillations of the wave per unit time
Period: it is the time it takes for the wave to complete one oscillation - it is equal to the reciprocal of the frequency
Amplitude: it is the maximum displacement of the wave, measured with respect to its equilibrium position