An electromagnetic-spectrum diagram can compare radiation types by wavelength, frequency, and object-size scale. In the illustrated scale, wavelength increases from gamma rays at ${}10^{-12}$ meters through X-rays at ${}10^{-10}$ meters, ultraviolet at ${}10^{-8}$ meters, visible light at ${}0.5 \times 10^{-6}$ meters, infrared at ${}10^{-5}$ meters, microwaves at ${}10^{-2}$ meters, and radio waves at ${}10^3$ meters. Across the same scale, the frequency labels decrease from ${}10^{20}$ to ${}10^4$ hertz, and the size comparison ranges from atomic nuclei to buildings.