Here's why:
* Electromagnetic Spectrum: The electromagnetic spectrum encompasses all types of light, from very low-energy radio waves to very high-energy gamma rays.
* Wavelength Range: Radio waves have the longest wavelengths, ranging from a few millimeters to thousands of kilometers.
* 1 Kilometer Wavelength: A wavelength of 1 kilometer is well within the typical range of radio waves used for various purposes, including long-range communication and astronomy.
