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: Understanding the Concept:
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: Detailed Explanation:
\begin{itemize} \item Lyman series: Transitions from n>1 to n = 1. These lie in the ultraviolet region. \item Balmer series: Transitions from n>2 to n = 2. These lie in the visible region. \item Paschen series: Transitions from n>3 to n = 3. These lie in the infrared region. \item Brackett series: Transitions from n>4 to n = 4. These lie in the infrared region. \item Pfund series: Transitions from n>5 to n = 5. These lie in the infrared region. \end{itemize}
Step 3: Final Answer:
The series in the UV region is the Lyman series, option (B).