Answer:True.
As you increase the wavelength the frequency decreases.
Step-by-step explanation:
The wavelength of a wave is the distance(in meters) between the two consecutive crest and trough of a wave. The S.I unit of the wavelength is meter.
The frequency of a wave is the number of complete wave cycle passing a particular point per second. The S.I unit of the frequency is Hertz.
Wave's frequency and wavelength are related to each other as
Frequency = 1 / Wavelength
As the Frequency is inversely proportional to the wavelength of a wave so as the frequency will increase the wavelength of the wave will decrease and vise-versa.
So, its true that As we increase the wavelength the frequency decreases.