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Which limitation of seismic S waves is important?

Answer and explanation

Correct answer: They do not pass through liquids

The direct answer is B: S waves do not pass through liquids. Seismic waves are vibrations produced by earthquakes. S means secondary or shear wave. A shear wave needs a material whose particles can resist sideways movement, so it travels through solids but not liquids. Reasoning: an earthquake produces S waves; scientists observe where these waves arrive and where they disappear; their absence through the outer core shows that the outer core is liquid. A is wrong because S waves do pass through solids. B is correct. C is wrong because seismic waves do not travel only in light; light is not the material medium meant here. D is wrong because they are not restricted to air and cannot travel through air as ordinary S waves. Remember: S means shear, and shear needs solidity.

Related tags

S WavesLiquidOuter Core

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