Convert Shakes to Femtoseconds
Convert Shakes (sh) to Femtoseconds (fs) instantly and accurately.
Conversion Formula
fs = sh × 10000000
About Shakes
A shake = exactly 10 ns (10⁻⁸ s) - the informal unit for fission prompt-neutron generation time, coined at Los Alamos during the Manhattan Project (1943-1945). A prompt-neutron generation in a supercritical core takes ~1-10 shakes; a full explosive chain reaction unfolds over ~50-100 shakes. The name alludes to 'two shakes of a lamb's tail'. Still used in reactor physics and weapons-design calculations. 1 shake = 10 ns.
About Femtoseconds
A femtosecond (fs) = 10⁻¹⁵ s - the timescale of molecular vibrations and chemical reactions. Bond stretching: 10-200 fs; bending: 50-500 fs. Ahmed Zewail won the 1999 Nobel Prize in Chemistry for femtochemistry, capturing transition states in real time. Ti:sapphire lasers produce 10-100 fs pulses; LASIK uses 10-100 fs for precise corneal cuts. At 800 nm, one optical cycle = 2.67 fs. Light travels 300 nm in 1 fs. 1 fs = 10⁻¹⁵ s.
Quick Reference Table
| Shakes (sh) | Femtoseconds (fs) |
|---|---|
| 1 sh | 10000000 fs |
| 2 sh | 20000000 fs |
| 5 sh | 50000000 fs |
| 10 sh | 100000000 fs |
| 25 sh | 250000000 fs |
| 50 sh | 500000000 fs |
| 100 sh | 1000000000 fs |