Podcast
Questions and Answers
What is the SI symbol for micrometre?
What is the SI symbol for micrometre?
- nm
- cm
- μm (correct)
- mm
What is the equivalent of one micrometre in millimetres?
What is the equivalent of one micrometre in millimetres?
- 0.01 mm
- 0.1 mm
- 0.001 mm (correct)
- 1 mm
What is the common non-SI term for micrometre?
What is the common non-SI term for micrometre?
- Centimetre
- Micron (correct)
- Millimetre
- Nanometre
What is the width range of a single human hair in micrometres?
What is the width range of a single human hair in micrometres?
When was the term 'micron' and the symbol μ officially accepted for use to denote the micrometre?
When was the term 'micron' and the symbol μ officially accepted for use to denote the micrometre?
What is the spindle of a micrometer made of?
What is the spindle of a micrometer made of?
In what year was the micrometer used with a telescope invented?
In what year was the micrometer used with a telescope invented?
What does the word 'micrometer' mean in Greek?
What does the word 'micrometer' mean in Greek?
When did the word 'micrometer' first appear in English writing?
When did the word 'micrometer' first appear in English writing?
What instruments are micrometers usually in the form of?
What instruments are micrometers usually in the form of?
Study Notes
Micrometre
- The SI symbol for micrometre is μ.
Micrometre Equivalent
- One micrometre is equivalent to 0.001 millimetres.
Non-SI Term
- The common non-SI term for micrometre is micron.
Human Hair Width
- The width of a single human hair ranges from 20 to 100 micrometres.
Acceptance of Micron
- The term 'micron' and the symbol μ were officially accepted for use to denote the micrometre in 1967.
Micrometer Components
- The spindle of a micrometer is typically made of metal.
Invention of Micrometer
- The micrometer used with a telescope was invented in 1636.
Origin of Micrometer
- The word 'micrometer' comes from the Greek words 'mikros' meaning small and 'metron' meaning measure.
First Appearance
- The word 'micrometer' first appeared in English writing in 1675.
Form of Micrometers
- Micrometers are usually in the form of callipers, screw threads, or verniers.
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Description
Test your knowledge about the micrometre, a unit of length equal to one millionth of a meter, commonly represented by the symbol μm. Learn about its usage, conversion, and significance in the International System of Units (SI).
