Which of the following spectrum series of hydrogen atom lies in ultraviolet band?

CONCEPT:

In the Bohr model, spectrum series are given below:

• The Lyman series: It includes the lines emitted by transitions of the electron from an outer orbit of quantum number n2 > 1 to the 1st orbit of quantum number n1 = 1.
  • All the energy wavelengths in the Lyman series lie in the ultraviolet band.
• The Balmer series: It includes the lines due to transitions from an outer orbit n2 > 2 to the orbit n1 = 2.
  • Four of the Balmer lines lie in the "visible" part of the spectrum.

• Paschen series (Bohr series, n1 = 3)
• Brackett series (n1 = 4)
• Pfund series (n1 = 5)​

EXPLANATION:

• When an electron in the Hydrogen atom transit from a higher energy orbit to 1st orbit. (outer orbit n2 > 1 to the orbit n1 = 1) known as Lyman Series.
• The energy released from this spectrum gives an Ultraviolet region of the spectrum.
• Hence the correct answer is option 1.

​Important Points

• Pfund and Paschen's series lies in the infrared region, Balmer series lies in the visible region while Lyman series of hydrogen atom lies in the ultraviolet region.

Additional Information

• When atoms are excited they emit light of certain wavelengths that correspond to different colors Due to the electron making transitions between two energy levels in an atom.
• The light emission can be seen as a series of colored lines, known as atomic spectra.