angular dispersion: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “angular dispersion” mean?
The variation in the angle of refraction or diffraction of light (or other waves) depending on its wavelength.
Audio
Pronunciation
Definition
Meaning and Definition
The variation in the angle of refraction or diffraction of light (or other waves) depending on its wavelength.
In optics and physics, it describes how a prism or diffraction grating spreads a beam of light into its constituent colors (spectrum) by causing rays of different wavelengths to emerge at different angles. More broadly, it can refer to the separation of any wave phenomena based on frequency due to angular differences.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The term is identical in both varieties.
Connotations
Purely technical and neutral in both varieties.
Frequency
Extremely low frequency in general discourse. Identical, niche usage in scientific communities in both regions.
Grammar
How to Use “angular dispersion” in a Sentence
The angular dispersion of [OPTICAL ELEMENT] is [VALUE/ADJECTIVE].[OPTICAL ELEMENT] exhibits/showcases/produces angular dispersion.Angular dispersion is measured/calculated/determined.Vocabulary
Collocations
Examples
Examples of “angular dispersion” in a Sentence
verb
British English
- The grating angularly disperses the incoming white light.
- A high-quality prism is designed to angularly disperse light efficiently.
American English
- The grating angularly disperses the incoming white light.
- The lens system is not intended to angularly disperse the beam.
adverb
British English
- The light was dispersed angularly by the prism.
- The components spread out angularly due to dispersion.
American English
- The beam was separated angularly across the detector.
- The signal varied angularly with wavelength.
adjective
British English
- The angular-dispersion properties of the material were critical.
- We studied the angular-dispersion coefficient.
American English
- The angular-dispersion characteristics of the grating are documented.
- An angular-dispersion measurement was performed.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in advanced physics, optics, and engineering textbooks, papers, and lectures.
Everyday
Not used in everyday conversation.
Technical
Core term in optical design, spectroscopy, and laser physics for describing the performance of prisms, gratings, and other dispersive elements.
Vocabulary
Synonyms of “angular dispersion”
Strong
Neutral
Weak
Vocabulary
Antonyms of “angular dispersion”
Watch out
Common Mistakes When Using “angular dispersion”
- Using it as a verb (e.g., 'The light angular-disperses').
- Confusing it with 'linear dispersion', which relates to spatial spread along a line or surface.
- Using it in non-scientific contexts where 'spread' or 'variation' would suffice.
FAQ
Frequently Asked Questions
No, they are related but distinct. Angular dispersion is the fundamental phenomenon of light separating by angle due to wavelength. Chromatic aberration is an unwanted imaging effect in lenses caused by angular dispersion, leading to color fringing.
In theory, for a specific material or design across a limited wavelength range (achromatic design), it can be minimized or designed to be nearly zero. In general, all dispersive materials have some angular dispersion across a broad spectrum.
High angular dispersion is crucial in spectroscopy. It allows a spectrometer to separate closely spaced spectral lines (high resolution), enabling detailed chemical analysis and precise wavelength measurement.
It is typically defined as the derivative dθ/dλ, where θ is the angle of deviation (refraction or diffraction) and λ is the wavelength. This describes how much the angle changes for a small change in wavelength.
The variation in the angle of refraction or diffraction of light (or other waves) depending on its wavelength.
Angular dispersion is usually technical/scientific in register.
Angular dispersion: in British English it is pronounced /ˈæŋɡjələ dɪˈspɜːʃən/, and in American English it is pronounced /ˈæŋɡjələr dɪˈspɜːrʒən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “N/A”
Learning
Memory Aids
Mnemonic
Think of a triangular PRISM making a rainbow. The ANGLES at which the different colors (red, blue) come out are different. The DISPERSION (spreading) is based on these ANGLES → ANGULAR DISPERSION.
Conceptual Metaphor
N/A (Highly literal, technical term).
Practice
Quiz
What does 'angular dispersion' specifically describe in optics?