Which type of spectrum consists of lines that represent distinct frequencies emitted by atoms or molecules?

• A. Band spectrum
• B. Line spectrum
• C. Absorption spectrum
• D. Continuous spectrum

Answer: (B)

Verified step by step guidance

1. Understand that different types of spectra arise from how atoms or molecules interact with light, either by emitting or absorbing specific wavelengths.
2. Recall that a continuous spectrum shows all wavelengths of light without interruption, like a rainbow, and is produced by a hot, dense object.
3. Know that an absorption spectrum appears when light passes through a cooler gas, causing certain wavelengths to be absorbed, resulting in dark lines on a continuous background.
4. Recognize that a band spectrum consists of groups of closely spaced lines, often from molecules, due to vibrational and rotational transitions.
5. Identify that a line spectrum consists of distinct, separate lines at specific frequencies emitted by atoms or molecules when electrons transition between energy levels.