Two waves that have the same amplitude but different wavelengths are called harmonic waves or simply waves of different frequencies. Frequency and wavelength are related properties of waves, but they are not directly dependent on each other. The wavelength is the distance between two consecutive points in a wave that are in phase, while the frequency is the number of complete cycles or oscillations of the wave that occur in one second.
For example, consider two waves traveling through a medium, such as water or air. If Wave A has a longer wavelength than Wave B, it means that the distance between consecutive points in Wave A is greater than that in Wave B. However, if both waves have the same amplitude, it means that the maximum displacement or height of the wave is equal for both waves.
In summary, the two waves can have different wavelengths but the same amplitude.