Electromagnetic radiation with a wavelength greater than that of X-rays includes various types, such as gamma rays, ultraviolet (UV) rays, visible light, infrared (IR) radiation, microwaves, and radio waves. Among these, gamma rays have the shortest wavelengths and the highest energy in the electromagnetic spectrum, while radio waves have the longest wavelengths and the lowest energy.
To be more specific, gamma rays have wavelengths shorter than 0.01 nanometers (nm), X-rays have wavelengths ranging from about 0.01 nm to 10 nm, and ultraviolet rays have wavelengths from about 10 nm to 400 nm. Visible light falls within the range of approximately 400 nm to 700 nm. Infrared radiation spans from around 700 nm to 1 millimeter (mm), followed by microwaves (1 mm to 1 meter) and radio waves (1 meter and greater).
So, in terms of wavelength, gamma rays and X-rays have shorter wavelengths than visible light, infrared radiation, microwaves, and radio waves.