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 seismic waves) are compressional waves that can travel through solid and liquid materials. Their diffraction (bending) occurs when they pass through the Earth's outer core, which is a liquid layer that causes the waves to refract. In the diagram:

• A: Inner core (solid)
• B: Outer core (liquid, causes P-wave diffraction)
• C: Mantle (solid)
• D: Crust (solid)

The change in density and state (liquid outer core) relative to the surrounding solid layers leads to the diffraction of P-waves.

Answer:

B