Crossword clues for femtosecond
Wiktionary
n. A unit of time equal to 0.000 000 000 000 001 seconds and with symbol fs.
WordNet
n. one quadrillionth of a second; one thousandth of a nanosecond
Wikipedia
A femtosecond is the SI unit of time equal to 10 or / of a second. That is one quadrillionth, or one millionth of one billionth, of a second. For context, a femtosecond is to a second as a second is to about 31.71 million years; a ray of light travels approximately 0.3 µm (micrometers) in 1 femtosecond, a distance comparable to the diameter of a virus.
The word femtosecond is formed by the SI prefix femto and the SI unit second. Its symbol is fs.
A femtosecond is equal to 1000 attoseconds, or 1/1000 picosecond. Because the next higher SI unit is 1000 times larger, times of 10 and 10 seconds are typically expressed as tens or hundreds of femtoseconds.
Shorter Times
- Typical time steps for molecular dynamics simulations are on the order of 1 fs.
- The waves of visible light oscillate with a period (reciprocal frequency) of about 2 femtoseconds ${\lambda\over{c}} = {600 \times 10^{-9}~{\rm m} \over 3 \times 10^8~{\rm m}~{\rm s}^{-1}} = 2.0 \times 10^{-15}~{\rm s}$. The precise period depends on the energy of the photons, which determines their color. (See wave–particle duality) This time can be calculated by dividing the wavelength of the light by the speed of light (approximately 3 x 10 m/s) to determine the time required for light to travel that distance.
- 1.3 fs – cycle time for 390 nanometer light, at the transition between violet visible light and ultraviolet
- 2.57 fs – cycle time for 770 nanometer light, at the transition between red visible light and near- infrared
- 15 fs – the swiftest chemical reaction, such as the absorption of a light photon in the Photosynthetic antenna molecule
- 200 fs – the average chemical reaction, such as the reaction of pigments in an eye to light
- 300 fs – the duration of a vibration of the atoms in an iodine molecule
Longer Times
Usage examples of "femtosecond".
Nimisha has finished the latest calculations on the femtosecond processor and, since I have meetings on the surface myself, I thought to spare her an unnecessary trip to Headquarters.
She was setting up what she knew would be a revolutionary femtosecond control system for the yacht.
That was only because, as Jon said, the preprogrammed AI had kicked in with its femtosecond reflexes, removing Meterios from commandand from making any fatal error.
On the other hand, things move a lot faster down in subparticle land, where the femtosecond is a unit that can be felt.
Time, you see, is what I have plenty of, with my femtosecond synapses.
For about a femtosecond, he longed to see everything the two humans in the cockpit were seeing.
Ord recited everything, including data accurate to a fraction of a femtosecond and to the brink of Planck space, and at every critical junction, he gave the names and failings of those gods most directly in charge.
Ord slashed at them, and mangled them, and inside that next endless femtosecond, he was winning.
A professor was looking for a research assistant to study femtosecond optical frequency combs.
But in my odd femtoseconds I could not help turning over that question in my mind, and I finally found an answer.
Her battle clocks, reset to zero, began to count off in femtoseconds, the last stop before the unknowable realtime of the universe.
Simplicity, especially with the femtosecond AI's now available, might be the way to go.
I may know a nanosecond from a femtosecond, but achieving trial balances and projections of what percentage our profits are above last year's is totally beyond me.