The electromagnetic waves with the longest wavelength are called "radio waves". There is no limit to how long the wavelengths can be.
the pacific ocean
Sonar waves.
stom
Swells
The electromagnetic waves with the longest wavelength are called radio waves.
It isn't clear what type of wave you are talking about. If you mean electromagnetic waves, the answer is "radio waves".
Radio waves have the longest wavelengths.
Radio waves have the longest wavelengths.
"radio waves" have longest wavelength..
ocean tides
Yes. They are called Tsunamis.