stark effect: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “stark effect” mean?
The splitting or shifting of spectral lines of atoms and molecules due to the presence of an external electric field. It is the electric-field analogue of the Zeeman effect, where a magnetic field causes splitting.
Audio
Pronunciation
Definition
Meaning and Definition
The splitting or shifting of spectral lines of atoms and molecules due to the presence of an external electric field. It is the electric-field analogue of the Zeeman effect, where a magnetic field causes splitting.
In quantum mechanics, it refers to the perturbation of atomic or molecular energy levels by an applied static electric field. The term is also used more broadly in spectroscopy and atomic physics to describe any electric-field-induced change in a spectral line's frequency, intensity, or polarization.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling conventions follow standard UK/US patterns for surrounding text (e.g., 'behaviour' vs. 'behavior').
Connotations
Identically technical and precise in both dialects.
Frequency
Equally low-frequency and specialized in both academic and professional scientific discourse.
Grammar
How to Use “stark effect” in a Sentence
The [noun phrase] exhibits a Stark effect.A Stark effect was observed in [noun phrase].The spectrum shows Stark effect splitting.to measure the Stark effect of [noun phrase]Vocabulary
Collocations
Examples
Examples of “stark effect” in a Sentence
adjective
British English
- The Stark-effect measurements were consistent with theory.
- They analysed the Stark-effect data.
American English
- The Stark-effect measurements were consistent with theory.
- They analyzed the Stark-effect data.
Usage
Meaning in Context
Academic
Used in advanced physics, physical chemistry, and electrical engineering publications and lectures to describe a fundamental quantum phenomenon.
Everyday
Virtually never used.
Technical
Central to experimental spectroscopy, laser physics, quantum optics, and the study of Rydberg atoms.
Vocabulary
Synonyms of “stark effect”
Neutral
Vocabulary
Antonyms of “stark effect”
Watch out
Common Mistakes When Using “stark effect”
- Misspelling as 'Stark affect'.
- Incorrectly capitalising as 'STARK Effect'.
- Using it as a general term for any electric field influence outside strict atomic/molecular spectroscopy.
FAQ
Frequently Asked Questions
It was discovered by the German physicist Johannes Stark in 1913, for which he received the Nobel Prize in Physics in 1919.
The linear Stark effect produces a shift proportional to the electric field strength and occurs in systems with a permanent electric dipole moment (like some molecules). The quadratic Stark effect produces a shift proportional to the square of the field strength and occurs in systems without a permanent dipole (like atoms), where the field induces a dipole moment.
It is used in Stark spectroscopy to measure electric fields in plasmas, determine molecular dipole moments, and in the tuning of lasers (e.g., in Stark shift optical modulators).
Yes, they are analogous. The Stark effect is caused by an external electric field, while the Zeeman effect is caused by an external magnetic field. Both cause splitting or shifting of spectral lines.
The splitting or shifting of spectral lines of atoms and molecules due to the presence of an external electric field. It is the electric-field analogue of the Zeeman effect, where a magnetic field causes splitting.
Stark effect is usually technical/scientific in register.
Stark effect: in British English it is pronounced /stɑːk ɪˈfɛkt/, and in American English it is pronounced /stɑrk əˈfɛkt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of an electric field putting 'stress' (STark) on an atom, causing its light signature (spectral lines) to split or shift.
Conceptual Metaphor
The electric field is a force that stretches or distorts the atom's energy landscape, much like gravity stretches a rubber sheet.
Practice
Quiz
What does the Stark effect describe?