Example image of eyePlorer eyePlorer map for 'Electromagnetic spectrum': Electromagnetic radiation Atom Continuum (theory) Infinity Planck length Universe Electron volt Frequency Photon Wavelength Femto- Speed of light Matter Transmission medium Gamma ray Infrared Microwave Radio waves Ultraviolet Visible spectrum X-ray Spectroscopy Astrophysics Emission spectrum Hydrogen Hertz Electron Radioactive decay Doppler effect Cosmic microwave background radiation Lyman series Redshift Blue shift Pion Greisen–Zatsepin–Kuzmin limit Antenna (radio) Radio Resonance Modulation Amateur radio Mobile phone Television Wireless network Frequency allocation Electrical conductor Radio-frequency induction Skin effect Microwave oven EHF Extremely high frequency