Question

In hydrogen atom, transition from the state n = 6 to n = 1 results in ultraviolet radiation. Infrared radiation will be obtained in the transition ______.

Options

• n = 6 to n = 1 

• n = 4 to n = 2 

• n = 6 to n = 2 

• n = 5 to n = 3

Answer 1

In hydrogen atom, transition from the state n = 6 to n = 1 results in ultraviolet radiation. Infrared radiation will be obtained in the transition n = 5 to n = 3.

Explanation:

In a hydrogen atom, the type of radiation emitted depends on the energy difference between two energy levels: 

• Lyman series (UV region): Transitions to n = 1
• Balmer series (Visible region): Transitions to n = 2
• Paschen series (Infrared region): Transitions to n = 3
• Brackett series (Infrared): Transitions to n = 4
• Pfund series (Infrared): Transitions to n = 5 

So, the transition from n = 5 to n = 3 belongs to the Paschen series, which lies in the infrared region of the electromagnetic spectrum.