Rydberg

Rydberg may refer to:

• Rydberg (crater), a crater on the moon
• In physics,
  • Rydberg constant
  • Rydberg formula
  • Rydberg atom (an atom in a state of high principal quantum number)
  • Rydberg molecule
  • a unit of energy, derived from the Rydberg constant, equal to half the Hartree energy
• Johannes Rydberg, Swedish physicist and deviser of the Rydberg formula, in whose honour the constant, the unit and the crater are named, as are Rydberg atoms
• Viktor Rydberg, Swedish author and poet
• Per Axel Rydberg, Swedish-American botanist
• Sam Rydberg, Swedish composer