The longest used is I think long wave radio which can be up to 1500 meters
Radio waves have the longest wavelength among the electromagnetic waves. They are used for communication and have wavelengths ranging from a few millimeters to hundreds of meters.
The longest wavelength corresponds to long wave radio, I think the longest used is about 2000 meters. The shortest are gamma rays, which occur in radioactivity, these are from about 10-11 meters down.
Radio waves have the longest wavelengths among the electromagnetic spectrum, ranging from a few centimeters to thousands of kilometers.
Radiowaves have the longest wavelength of electromagnetic waves.
Radio waves have the longest wavelengths in the electromagnetic spectrum
The electromagnetic waves with the longest wavelengths are called radio waves. There is no upper limit as to how large the wavelength can get; for example, you might imagine an electromagnetic wave with a wavelength as large as the diameter of our galaxy. That would still be called a radio wave.
Wavelengths in the radio wave region of the electromagnetic spectrum have the lowest energy. These waves have long wavelengths and low frequencies, making them less energetic compared to other types of electromagnetic radiation like gamma rays or X-rays.
Radio waves are electromagnetic waves. The radio waves have the longest wavelengths in the electromagnetic spectrum. A radio wave has a much longer wavelength than does visible light. We use radio waves extensively for communications.
The longest wavelengths on the electromagnetic spectrum are called radio waves. They have the lowest frequencies and carry information through long distances.
Radio waves have the longest wavelength in the electromagnetic spectrum.
Radio waves are amongst the shortest. Gamma and X rays are shorter. The long wave lengths are at the other end of the electromagnetic spectrum. These are called 'infra red,
The electromagnetic waves with the longest wavelength are called "radio waves". There is no limit to how long the wavelengths can be.