Here's why:

* Wavelength (λ): The distance between two consecutive crests or troughs of a wave.

* Frequency (f): The number of wave cycles passing a point in one second.

Imagine a wave moving across the surface of water. The wavelength is the distance between two peaks of the wave. The frequency is how many peaks pass a certain point each second.

The speed of the wave is how quickly the wave is moving across the water. If the wave has a longer wavelength, it will take longer to pass a point, but if it has a higher frequency, more waves will pass the point each second.

The relationship between wavelength, frequency, and speed is expressed in the following equation:

Speed (v) = Wavelength (λ) x Frequency (f)

This relationship holds true for all types of waves, including light waves, sound waves, and water waves.