Meter: Difference between revisions
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<onlyinclude>A '''meter''' is the [[SI]] unit of distance. The meter is defined as the length of the path travelled by [[light]] in [[vacuum]] during a time interval of 1/299 792 458 of a second.</onlyinclude><ref>NIST. ''Historical context of the SI'' [Online]. Available: http://physics.nist.gov/cuu/Units/meter.html</ref> The | <onlyinclude>A '''meter''' is the [[SI]] [[units|unit]] of distance. The meter is defined as the length of the path travelled by [[light]] in [[vacuum]] during a time interval of 1/299 792 458 of a [[second]].</onlyinclude><ref>NIST. ''Historical context of the SI'' [Online]. Available: http://physics.nist.gov/cuu/Units/meter.html</ref> The meter is defined as a measure of time because time can be measured far more accurately than length (at the time of the definition, time could be measured to 1 part in 10<sup>13</sup> whereas length could only be measured to 4 parts in 10<sup>9</sup>).<ref>New Scientist. (1963). ''Time to remeasure the metre'' [Online]. Available: http://books.google.ca/books?id=pKU5MXqo4UYC&pg=PA258&redir_esc=y#v=onepage&q&f=false</ref> | ||
Metric prefixes make longer [[units]] like '''kilometer''', km (1000 m) and '''megameter''', Mm (10<sup>6</sup> m) and smaller units as well like '''millimeter''', mm (0.001 m) and the μm (10<sup>-6</sup> m). The μm is called both the '''micrometer''' and the '''micron'''. The word micrometer is ambiguous since it's also a device that measures very precise lengths, hence the two terms. | |||
==Meter Unit Conversion== | ==Meter Unit Conversion== | ||
<html><br /> <iframe src="http://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Length&defaultFrom=meter&defaultTo=foot" scrolling="no" width="750" height="200"> </iframe><br /> </html> | <html><br /> <iframe src="http://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Length&defaultFrom=meter&defaultTo=foot" scrolling="no" width="750" height="200"> </iframe><br /> </html> | ||
Revision as of 18:49, 28 August 2015
A meter is the SI unit of distance. The meter is defined as the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.[1] The meter is defined as a measure of time because time can be measured far more accurately than length (at the time of the definition, time could be measured to 1 part in 1013 whereas length could only be measured to 4 parts in 109).[2]
Metric prefixes make longer units like kilometer, km (1000 m) and megameter, Mm (106 m) and smaller units as well like millimeter, mm (0.001 m) and the μm (10-6 m). The μm is called both the micrometer and the micron. The word micrometer is ambiguous since it's also a device that measures very precise lengths, hence the two terms.
Meter Unit Conversion
Read more about meters Dr. Rowlett's unit dictionary.
References
- ↑ NIST. Historical context of the SI [Online]. Available: http://physics.nist.gov/cuu/Units/meter.html
- ↑ New Scientist. (1963). Time to remeasure the metre [Online]. Available: http://books.google.ca/books?id=pKU5MXqo4UYC&pg=PA258&redir_esc=y#v=onepage&q&f=false