Question

in this diagram of the earths interior, which part causes the diffraction of p waves made by earthquakes? a b c d

Explanation:

P - waves (primary waves) are seismic waves that can travel through solids, liquids, and gases. The Earth's outer core (part B in typical Earth - interior diagrams) is liquid. When P - waves encounter the liquid outer core from the solid mantle, they undergo diffraction (bending) because the wave speed changes at the boundary between the solid mantle and the liquid outer core. The inner core (A) is solid, the mantle (C) is solid, and the crust (D) is solid. So the part that causes the diffraction of P - waves from earthquakes is the outer core, which is represented by B.

Answer:

B