Wavelength:The wavelength of a periodic wave is the distance between two consecutive points that are in phase with each other. It represents one complete cycle of the wave.
Period: The period of a periodic wave is the time it takes for one complete cycle or repetition of the wave to occur.
Frequency:Frequency is the number of complete cycles or repetitions of a periodic wave that occur per unit time. It is inversely proportional to the period and directly proportional to the wavelength.