Question

In hydrogen spectrum, the series of lines appearing in ultra violet region of electromagnetic spectrum are called

• A. Balmer lines
• B. Lyman lines
• C. Pfund lines
• D. Brackett lines

Hint:

Remember: Lyman (UV), Balmer (Visible), Paschen (IR), Brackett (IR), Pfund (IR).

Answer 1

The Correct Option is B

Step 1: Basic Principle
The hydrogen spectrum consists of several series of lines corresponding to electron transitions from higher energy levels to a fixed lower energy level.
Step 2: Solution Procedure:

Lyman series: Transitions from n>1 to n = 1. These lie in the ultraviolet region.
Balmer series: Transitions from n>2 to n = 2. These lie in the visible region.
Paschen series: Transitions from n>3 to n = 3. These lie in the infrared region.
Brackett series: Transitions from n>4 to n = 4. These lie in the infrared region.
Pfund series: Transitions from n>5 to n = 5. These lie in the infrared region.

Step 3: Required Answer:
The series in the UV region is the Lyman series, option (B).