P-waves refract at the boundary between inner and outer core because
A)there is a change of phase between inner and outer core.
B)there is a change in chemical composition between inner and outer core.
C)they gain speed.
D)they lose speed.

Question

Quizplus · Accepted Answer

P-waves refract at the boundary between the inner and outer core due to a change of phase; the outer core is liquid, and the inner core is solid, affecting how these waves propagate.

P-Waves Refract at the Boundary Between Inner and Outer Core