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.
Answer. Mechanical waves require a medium, such as air, to travel through. An example of a mechanical wave is a sound wave, which requires air to travel. Electromagnetic waves do not need a medium to travel through, as they travel through radiation. An example of an electromagnetic wave is ultraviolet light, which can even travel through the empty vacuum of space. Tabitha Farrant.