Here's why:

* Frequency and Wavelength are Inversely Proportional: This means that as one increases, the other decreases. The relationship is described by the equation:

* Speed of the wave = Frequency x Wavelength

* Low Frequency: A low frequency means the wave cycles (repeats) fewer times per second.

* Long Wavelength: To maintain the speed of the wave, a lower frequency requires a longer distance for each cycle, resulting in a longer wavelength.

Think of it this way:

* High Frequency: A high frequency wave is like a fast-paced song, with many notes packed close together. The wavelength is short.

* Low Frequency: A low frequency wave is like a slow, drawn-out song, with fewer notes spread further apart. The wavelength is long.