Vasco da Gama Bridge, Portugal - 56,381 feet: Lisbon's Vasco da Gama Bridge is the longest in Europe, spanning a total distance of 10.7 miles. Taking three years to complete, the bridge opened for traffic in 1998 to celebrate the 500th anniversary of Vasco da Gama's discovery of the maritime route from Europe to India.
A type of wave that can travel through empty space as well as through matter is electromagnetic wave.
Report Abuse. Here's a few differences: Electromagnetic waves travel at the speed of light, mechanical waves travel at or below the speed of sound in the medium through which they're traveling. Mechanical waves can only flow through matter, EM waves can travel through free space (and through matter, as well).EM waves are carried by photons, and therefore have some of the properties of particles, as well as the properties of waves.echanical waves can only flow through matter, EM waves can travel through free space (and through matter, as well). EM waves are carried by photons, and therefore have some of the properties of particles, as well as the properties of waves.