The Shadow Zone,in which seismic waves from an earthquake can be detected only very faintly,is caused by
A) S and P waves being refracted at the boundary of Earth's core and P waves being absorbed by the core.
B) both P and S waves being refracted into Earth's core,thus concentrating the waves on the far side of Earth.
C) all seismic waves being absorbed by Earth's molten core,so that none reach the far side of Earth.
D) S and P waves being refracted at the boundary of Earth's core and S waves being absorbed by the core.

Question

Quizplus · Accepted Answer

The Shadow Zone is caused by S and P waves being refracted at the boundary of Earth's core and S waves being absorbed by the core. This results in a zone on the opposite side of the Earth from the epicenter of an earthquake where seismic waves can only be detected very faintly or not at all. P waves are able to refract and travel through the outer core, but S waves are unable to travel through the liquid outer core and are absorbed by it, resulting in the faint or absent seismic waves in the Shadow Zone.

The Shadow Zone,in Which Seismic Waves from an Earthquake Can