Buzz
Some elements in our world are so small that they evade direct detection, yet this doesn’t stop us from quantifying them. Explore 11 specialized units of measurement crafted to define the tiniest of entities.
1. The Shake
If someone claims they’ll return 'in two shakes,' they’re likely to take far longer—unless they’re referring to the physicist’s definition. A shake measures the duration of a single step in a nuclear chain reaction, equivalent to 10 billionths of a second.
2. The Jiffy
Faster than a shake, the jiffy measures the time light takes to traverse the width of a nucleus. While light takes just over a second to journey from the moon to Earth, covering the span of a nucleus is astonishingly quicker. In computer engineering, however, a jiffy refers to the clock cycle, lasting a comparatively sluggish 10 milliseconds.
3. The Planck Time
Planck time represents the duration light requires to travel one Planck length. These units, named after physicist Max Planck, were devised to simplify descriptions of the universe using universal constants. Primarily used in quantum physics, a Planck time unit is a sextillion times quicker than a jiffy.
4. The Barn
Physicists require methods to measure area, but in the atomic realm, what we consider minuscule might appear enormous in comparison. Take a uranium nucleus, for instance—it’s massive relative to other nuclei! This is why nuclear scientists likened its size to a barn. Compared to smaller nuclei, it truly stands out. One barn equals 10^(-28) square meters. Other units include the megabarn, kilobarn, millibarn, microbarn (often called an 'outhouse'), and the tiny yoctobarn, also known as a 'shed.'
5. The Angstrom
Named after physicist Anders Ångström, the Angstrom is a unit for measuring light wavelengths. It equals one-tenth of a nanometer, or one ten-billionth of a meter. The human eye detects light within the 4000 to 7000 Angstrom range. Using Angstroms to describe electromagnetic radiation highlights the vastness of the spectrum and the limited portion visible to us. Ultraviolet light extends down to 10 Angstroms, while infrared reaches up to a million.
6. The Attogram
A decade ago, scientists developed the ability to measure weights at the attogram scale, where one attogram is 10^(-18) grams, or a quintillionth of a gram. A small virus weighs around 10 attograms, significantly lighter than a typical bacterium, which is measured in picograms (10^(-12) grams).
7. The Becquerel
Named after Henri Becquerel, who shared the Nobel Prize with the Curies for his contributions to radiation physics, the becquerel quantifies radioactivity. It measures the rate of radioactive decay, where one becquerel equals one decay per second. Another unit, the curie, represents a much larger scale—37 billion decays per second.
8. The Jansky
Astronomers use the jansky to measure the intensity of light or energy from celestial sources. Named after physicist Karl Jansky, one jansky equals 10^(-26) watts per square meter per hertz. While visible objects in the sky register in thousands or millions of janskys (like the sun), most cosmic phenomena are detectable only in minuscule fractions, making the jansky an essential unit for astronomers.
9. The Centipawn
Chess software requires a method to evaluate the strength of moves or player positions, which is where centipawns come into play. Losing a pawn equates to a one-pawn deficit, but this loss is broken down into 100 centipawns for precise analysis. When comparing two similar moves, a minor advantage might be represented by just a few centipawns.
10. The Micromort
The micromort quantifies the likelihood of death, with one micromort representing a one-in-a-million chance. Activities like smoking 1.4 cigarettes, spending an hour in a coal mine, or skydiving (7 micromorts) each increase your risk by one micromort. Simply living another day adds 39 micromorts. While useful in insurance, micromorts are best not dwelled upon in daily life.
11. The Quasihemidemisemiquaver
In British musical notation, the quasihemidemisemiquaver is the term for what Americans refer to as a 128th note. This note is so rare that it’s seldom discussed, as most compositions don’t go beyond 32nd notes (demisemiquavers). Occasionally, 64th notes (hemidemisemiquavers) appear, but the quasihemidemisemiquaver’s rarity earns its impressively long, 10-syllable name. Try saying it in rhythm for added fun!
