Final answer:
A line spectrum is the spectrum produced by light from an electrically excited gas striking a prism. This image is called a line spectrum and every element has its own unique, characteristic line spectrum.
Step-by-step explanation:
The spectrum produced by light from an electrically excited gas striking a prism is called a line spectrum.
When electricity is passed through a gas and light is emitted, we see only certain lines of light in the image when it is passed through a prism.
This image is called a line spectrum and every element has its own unique, characteristic line spectrum.