Step 1: Hydrogen Spectral Series Review.
- Lyman series: electron transitions to \(n=1\), high energy → ultraviolet.
- Balmer series: electron transitions to \(n=2\) → visible light.
- Paschen, Brackett, Pfund series: electron transitions to \(n=3,4,5\) → infrared.
Step 2: Summary.
Therefore, the Lyman series is located in the ultraviolet region of the electromagnetic spectrum.
Final Answer: \[ \boxed{\text{Ultraviolet}} \]