Convert Fathoms to Light Seconds
Convert Fathoms (ftm) to Light Seconds (ls) instantly and accurately.
Conversion Formula
ls = ftm × 6.100220173e-9
About Fathoms
A fathom (ftm) is equal to 6 feet or 1.8288 meters, traditionally based on the span of a man's outstretched arms. This unit has been used for centuries in maritime navigation to measure water depth and rope or cable lengths. While largely replaced by meters in modern nautical charts, fathoms remain in use by sailors and in naval traditions. The Mariana Trench, Earth's deepest point, reaches about 6,000 fathoms. The term 'to fathom' meaning 'to understand' derives from this nautical unit.
About Light Seconds
A light second (ls) is the distance light travels in one second through a vacuum, exactly 299,792,458 meters. This represents one of the fundamental constants in physics - the speed of light. For perspective, light takes about 1.3 seconds to travel from Earth to the Moon, and 8.3 minutes (500 light seconds) to reach us from the Sun. This unit is crucial in astronomy, telecommunications (satellite delays), and physics experiments, helping us understand the finite speed of light and its implications for communication and observation.
Quick Reference Table
| Fathoms (ftm) | Light Seconds (ls) |
|---|---|
| 1 ftm | 6.1 × 10-9 ls |
| 2 ftm | 1.22 × 10-8 ls |
| 5 ftm | 3.05 × 10-8 ls |
| 10 ftm | 6.1 × 10-8 ls |
| 25 ftm | 1.525 × 10-7 ls |
| 50 ftm | 3.05 × 10-7 ls |
| 100 ftm | 6.1 × 10-7 ls |