line spectrum: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “line spectrum” mean?
A spectrum consisting of discrete, narrow lines of specific wavelengths, characteristic of atomic or molecular emissions or absorptions.
Audio
Pronunciation
Definition
Meaning and Definition
A spectrum consisting of discrete, narrow lines of specific wavelengths, characteristic of atomic or molecular emissions or absorptions.
In a broader sense, any representation or analysis showing distinct, separate components or categories, as opposed to a continuous range.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The concept and terminology are identical in scientific communities.
Connotations
None beyond the strict scientific definition.
Frequency
Equally low-frequency in general language but standard in relevant scientific fields in both regions.
Grammar
How to Use “line spectrum” in a Sentence
The [element] exhibits a line spectrum.A line spectrum of [source] was recorded.to analyse/observe/identify a line spectrumVocabulary
Collocations
Examples
Examples of “line spectrum” in a Sentence
verb
British English
- The excited gas will line-spectrum when viewed through a diffraction grating.
- We attempted to line-spectrum the unknown compound.
American English
- The plasma line-spectra under those conditions.
- The instrument is designed to line-spectrum the emission.
adjective
British English
- The line-spectrum analysis confirmed the presence of helium.
- They used a line-spectrum source for calibration.
American English
- The line-spectrum data was crucial for the experiment.
- We need a line-spectrum lamp for this setup.
Usage
Meaning in Context
Business
Not used.
Academic
Core term in physics and chemistry for describing the light emitted or absorbed by atoms.
Everyday
Virtually never used in everyday conversation.
Technical
The primary context. Used in spectroscopy, astronomy, quantum mechanics, and analytical chemistry.
Vocabulary
Synonyms of “line spectrum”
Neutral
Weak
Vocabulary
Antonyms of “line spectrum”
Watch out
Common Mistakes When Using “line spectrum”
- Using 'line spectrum' to describe a broad range of opinions or ideas (incorrect metaphorical use).
- Confusing it with 'continuous spectrum', e.g., 'Sunlight forms a line spectrum' (false, it's continuous).
FAQ
Frequently Asked Questions
Not exactly. A prism (or diffraction grating) is a tool used to produce a spectrum. A 'line spectrum' describes the specific type of output (discrete lines) you see when analysing light from certain sources like gases.
Yes, but you need a simple spectroscope. View the light from a fluorescent lamp or a street sodium-vapour lamp through one, and you will see a line spectrum.
Because the pattern of lines is unique to each element, allowing scientists to identify its presence in a sample (e.g., in a star or a chemical mixture) with certainty, just as a fingerprint identifies a person.
An emission line spectrum shows bright lines on a dark background (light emitted by a hot gas). An absorption line spectrum shows dark lines on a bright background (light from a hot source passing through a cooler gas, which absorbs specific wavelengths).
A spectrum consisting of discrete, narrow lines of specific wavelengths, characteristic of atomic or molecular emissions or absorptions.
Line spectrum is usually technical/scientific in register.
Line spectrum: in British English it is pronounced /ˈlaɪn ˌspek.trəm/, and in American English it is pronounced /ˈlaɪn ˌspek.trəm/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a 'line' as a specific address for light. A 'line spectrum' is like a list of precise addresses (wavelengths) where an atom's light lives, not a neighbourhood (continuous spectrum).
Conceptual Metaphor
ATOMIC FINGERPRINT (A line spectrum is a unique identifier for an element, much like a fingerprint identifies a person).
Practice
Quiz
What is the primary cause of a line spectrum?