Example image of eyePlorer eyePlorer map for 'Balmer series': Atomic physics Hydrogen atom Spectral line Empirical Johann Jakob Balmer Electron Hydrogen Light Photon Principal quantum number Spectrum Ultraviolet Wavelength Electromagnetic spectrum Hydrogen spectral series Lyman series Rydberg formula Visible spectrum H-alpha Emission nebula Orion Nebula Fine structure Spectroscopy Johannes Rydberg Rydberg constant Stellar classification Surface gravity Doppler effect Radial velocity Emission spectrum Kelvin Star Active galactic nucleus Nebula Planetary nebula Calcium Fraunhofer lines Joseph von Fraunhofer Helium Theoretical and experimental justification for the Schrödinger equation Scientific phenomena named after people David Stanley Evans HR Carinae Herbig Ae/Be star Rydberg–Ritz combination principle B-type main sequence star Shell star Wolf-Rayet star Spectrum analysis Theodor W. Hänsch
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