crookes lens: meaning, definition, pronunciation and examples
Extremely Rare (Highly Technical)Technical/Scientific
Quick answer
What does “crookes lens” mean?
A type of lens, often made of fluorite, used in ultraviolet microscopy and other specialised optical applications, designed to correct chromatic aberration.
Audio
Pronunciation
Definition
Meaning and Definition
A type of lens, often made of fluorite, used in ultraviolet microscopy and other specialised optical applications, designed to correct chromatic aberration.
Any optical lens, particularly in historical or specific technical contexts, that uses specific materials or designs to transmit ultraviolet light effectively, named after the scientist Sir William Crookes who developed such materials.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage; the term is identical in both variants due to its highly technical, historical nature.
Connotations
Connotes historical scientific apparatus, 19th/early 20th century optics, and specialised laboratory work.
Frequency
Equally and exceedingly rare in both varieties, confined to historical texts on optics or very specific technical discussions.
Grammar
How to Use “crookes lens” in a Sentence
The [microscope] was fitted with a [Crookes lens].A [Crookes lens] made of [fluorite] was used to [study ultraviolet light].Vocabulary
Collocations
Examples
Examples of “crookes lens” in a Sentence
adjective
British English
- The Crookes-lens design was revolutionary for its time.
American English
- The microscope had a Crookes-lens assembly.
Usage
Meaning in Context
Business
Not used.
Academic
Used only in highly specialised historical or optical physics papers discussing early microscopy techniques.
Everyday
Never used.
Technical
Primary context; refers to a specific lens type in optics, microscopy, or history of science.
Vocabulary
Synonyms of “crookes lens”
Neutral
Weak
Vocabulary
Antonyms of “crookes lens”
Watch out
Common Mistakes When Using “crookes lens”
- Writing 'crooks lens' (incorrect spelling).
- Using it as a general term for any lens.
- Not capitalising 'Crookes'.
- Assuming it is in common use.
FAQ
Frequently Asked Questions
No, it is an extremely rare and technical term from the history of science and optics.
It is named after Sir William Crookes, a 19th-century British chemist and physicist who worked with materials transparent to ultraviolet light.
No, it must be capitalised as it derives from a proper noun (Crookes).
Only in highly specialised texts on the history of microscopy, ultraviolet optics, or biographies of Sir William Crookes.
A type of lens, often made of fluorite, used in ultraviolet microscopy and other specialised optical applications, designed to correct chromatic aberration.
Crookes lens is usually technical/scientific in register.
Crookes lens: in British English it is pronounced /ˈkrʊks ˌlɛnz/, and in American English it is pronounced /ˈkrʊks ˌlɛnz/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'Crookes' rhyming with 'books' – old books about science might mention the 'Crookes lens' for seeing the invisible (UV light).
Conceptual Metaphor
A KEY TO THE INVISIBLE (as it allows observation of ultraviolet spectra).
Practice
Quiz
What is a Crookes lens primarily used for?