Convert Speed of Light (c) to Speed of Sound in Sea Water (vₛₑₐ) instantly.
About these units
Speed of Light (c)
The speed of light in a vacuum, denoted c, is exactly 299,792,458 m/s, one of the most fundamental constants of physics. Light speed defines the structure of spacetime, the upper limit for classical information transfer, and the basis for relativity. Time dilation, length contraction, and mass-energy equivalence (E = mc²) all arise from the invariance of c. In astronomy, the speed of light is used to define light-years, measure cosmic distances, and synchronize observations across telescopes. In communication technology, optical networks rely on light-speed propagation through fiber, albeit slightly slower than in vacuum. c is not just a speed—it is a cornerstone of the physical universe.
Speed of Sound in Sea Water (vₛₑₐ)
In sea water, the speed of sound is generally higher—around 1,530–1,540 m/s—due to dissolved salts, temperature gradients, and pressure at depth. Sea water's complex structure causes refraction of sound waves, creating deep sound channels (like the SOFAR channel) that allow sound to travel vast distances with minimal attenuation. Oceanographers use sound-speed profiles to map underwater topography, measure ocean temperatures, and study global climate patterns. The speed of sound in sea water is essential for both marine ecology and military navigation.