When the waves cross the boundary between two different layers, there is a sudden change in direction due to refraction. A surface wave travels along the surface of the Earth. It is the slowest of ...

The S wave shadow zone is the area of the Earth’s surface where S waves are not detected following an earthquake. This shadow zone has led geologists to a model of the Earth with a solid mantle ...

Waves spread out in circular patterns and can ... focusing them on a sharp metallic tip positioned just above the material's surface. "The light sets the electrons in the tip in motion," explains ...

The International Space Station (ISS)detected atmospheric waves in the mesosphere, a layer located 31 to 55 miles (88.51 km) above Earth’s surface. These waves were invisible to those on the ...