Are there waves with lower frequencies than radio waves?

First, I think I need to clarify something. Radio waves, infrared, visible light, ultraviolet, X-rays, Gamma rays, are all the same thing - photons. All that changes is the frequency. As frequency goes down, wavelength goes up. read more

Radio waves, infrared, visible light, ultraviolet, X-rays, Gamma rays, are all the same thing - photons. All that changes is the frequency. As frequency goes down, wavelength goes up. read more

Much of lower frequency, longwave radio waves travel by ground waves. In this manner, they can follow the Earth's curvature, rather than be line-of-sight, like higher frequencies. Line-of-sight is different everywhere, as hills, buildings, mountains, and other terrain features will block higher frequencies. read more

(In astronomy, AFAIK, they use an arbitrary energy division. IIRC it's 1 MeV) In general, gammas are considered to be high-energy, and there's no other name — nothing higher than gamma. Radio waves get subdivided, like high frequency, low frequency, very low frequency and extremely low frequency. But nothing lower. read more