The long waves (which also have low energy) are radio waves. Then microwaves and infrared. Then visible light, red to violet (ROYGBIV). Then ultraviolet, X-Rays, and gamma rays (which have the...
Long wave radio waves, up to 1500 meters. Gamma rays have the shortest wavelength, highest frequency.
They have different wavelength.
I don't think there is any upper limit, but the longest used in practice are in long wave radio transmission, this can be around 1500 meters
Radio Waves have the longest wavelength. the longest measured wavelength was about 30 million kilometers, a very rare recording.