Asked in ScienceTelevision and VideoPhysicsEarth Sciences
Why does sound carry better in the fog?
October 18, 2007 8:09PM
What's fog? Fog is caused by the condensation of water molecules in air. This leads to the increase in the density in air. So, the layman answer can be: Velocity of sound is greater in Denser materials, so during fog velocity of sound is greater. Mathematicaly: v2=Bulk modulus/density
we can say stress due to sound wave normally and in fog is constant.
Therefore, v2 is inversely proportional to strain*density.
during fog this value is less than normal, that's why velocity of sound wave in fog is greater.