Question

Paschen series in spectrum of hydrogen atom lies in ______.

Options

• infrared region

• ultraviolet region

• visible region

• partly in ultraviolet region and partly in visible region.

Answer 1

Paschen series in spectrum of hydrogen atom lies in infrared region.

Explanation:

Electronic transitions between various energy levels are represented by the hydrogen atom’s spectral series. Every series is located in a certain electromagnetic spectrum region.

The regions for different hydrogen series are:

1. Lyman series (n₁ = 1): Ultraviolet (UV) region.
2. Balmer series (n₁ = 2): Visible region.
3. Paschen series (n₁ = 3): Near Infrared (IR) region.
4. Brackett series (n₁ = 4): Infrared (IR) region.
5. Pfund series (n₁ = 5): Far Infrared (IR) region.

∴ The Paschen series lies in the infrared region.