The Paschen series of hydrogen spectrum lies in which region?

Step-by-step solution

The spectral lines of the hydrogen atom are categorized into series based on the energy level transitions of the electron. The transition of an electron from higher energy levels n₂ to a lower energy level n₁ is given by the Rydberg formula 1 = R ( 1 n₁^2 - 1 n₂^2 ) , where n₁ is the principal quantum number of the final state. For the Lyman series, n₁ = 1 (UV region). For the Balmer series, n₁ = 2 (Visible region). For the Paschen series, n₁ = 3 . Transitions to n₁ = 3 result in wavelengths that fall within the in