why does wavelength decrease when frequency increases
Report Abuse. Frequency and wavelength are inversely proportional. So as frequency increases, the wavelength decreases. One way to think about this is frequency is the number of cycles that occur in a period of time, like a cycle per second, or Hertz.So if you increase the number of times that your repeat the cycle, the wavelength has to get smaller to accommodate.hus if you use sound sources of higher frequencies, the wavelengths will decrease. This is because v= speed of sound = frequency * wavelength As v remains the same, increasing frequency,should decrease the wavelength.