monochromator: meaning, definition, pronunciation and examples

C2
UK/ˌmɒnə(ʊ)ˈkrəʊmeɪtə/US/ˌmɑːnəˈkroʊmeɪtər/

Technical/Scientific

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Quick answer

What does “monochromator” mean?

An optical device that isolates a narrow band of wavelengths (a single colour) from a broader spectrum of light.

Audio

Pronunciation

Definition

Meaning and Definition

An optical device that isolates a narrow band of wavelengths (a single colour) from a broader spectrum of light.

A key component in spectroscopy and analytical instruments, used to select specific wavelengths for measurement, analysis, or illumination. In broader technical contexts, it can refer to any system designed to produce monochromatic light.

Dialectal Variation

British vs American Usage

Differences

No significant lexical differences. Potential minor spelling consistency in derivative terms (e.g., 'monochromatise' vs. 'monochromatize').

Connotations

Identical technical connotations. The word is devoid of cultural or regional nuance.

Frequency

Extremely low frequency in general discourse, identically high within relevant STEM fields in both regions.

Grammar

How to Use “monochromator” in a Sentence

The [spectrometer] incorporates a [high-resolution] monochromator.Monochromatic light is produced by [passing broadband light] through a monochromator.The [researcher] adjusted the monochromator to [a specific wavelength].

Vocabulary

Collocations

strong
grating monochromatorprism monochromatorscanning monochromatordouble monochromatorinstall a monochromatorwavelength of a monochromator
medium
output of the monochromatorlight from the monochromatorcalibrate the monochromatormonochromator systemmonochromator setting
weak
precise monochromatorresearch monochromatormonochromator deviceusing a monochromator

Examples

Examples of “monochromator” in a Sentence

adjective

British English

  • The monochromator unit was carefully aligned.
  • We need a monochromator-based setup.

American English

  • The monochromator assembly required calibration.
  • It was a monochromator-intensive experiment.

Usage

Meaning in Context

Business

Virtually never used, except possibly in technical sales specifications for scientific equipment.

Academic

Core term in papers and textbooks on spectroscopy, optical engineering, analytical chemistry, and physics.

Everyday

Not used.

Technical

The primary register. Essential for describing the function of spectrometers, spectrophotometers, and other optical analysis tools.

Vocabulary

Synonyms of “monochromator”

Neutral

wavelength selectorspectral isolator

Weak

filter (imprecise)

Vocabulary

Antonyms of “monochromator”

polychromatorbroadband source

Watch out

Common Mistakes When Using “monochromator”

  • Confusing it with a 'monochrome display' (which shows only shades of one colour, not selects a wavelength).
  • Using 'monochromator' to refer to a person who paints in monochrome.
  • Misspelling as 'monochromater'.
  • Pronouncing it as /ˈmɒnəkrəˌmeɪtə/ (stress on the first syllable).

FAQ

Frequently Asked Questions

Not exactly. A prism can be a component *inside* a monochromator to disperse light, but a monochromator is a complete device that includes an entrance slit, a dispersive element (like a prism or grating), and an exit slit to select the wavelength.

Almost exclusively in scientific laboratories, inside instruments like spectrophotometers (used in chemistry/biochemistry labs), spectral radiometers, or advanced colour measurement systems. You would not find one in everyday electronics.

Within its operational range, yes. A monochromator is tuned to select a specific wavelength, which corresponds to a specific pure spectral colour (e.g., 650 nm is red, 530 nm is green). It cannot produce mixed colours like brown.

A monochromator uses dispersion and slits to achieve very high wavelength selectivity and purity, and it can be continuously tuned across a range. A filter (especially a simple colour filter) typically blocks a wider range of wavelengths less precisely and is fixed for a particular colour band.

An optical device that isolates a narrow band of wavelengths (a single colour) from a broader spectrum of light.

Monochromator is usually technical/scientific in register.

Monochromator: in British English it is pronounced /ˌmɒnə(ʊ)ˈkrəʊmeɪtə/, and in American English it is pronounced /ˌmɑːnəˈkroʊmeɪtər/. Tap the audio buttons above to hear it.

Learning

Memory Aids

Mnemonic

Imagine a MONO (single) CHROMA (colour) -TOR (maker/device): a device that makes a single colour from many.

Conceptual Metaphor

A PRECISE SIEVE FOR LIGHT; A TUNED RADIO FOR COLOURS.

Practice

Quiz

Fill in the gap
To analyse the fluorescent properties of the sample, the broadband excitation light was first passed through a to select the 488nm wavelength.
Multiple Choice

What is the primary function of a monochromator?

Practise

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