The earthquake waves that have transverse movements are known as
APrimary waves
BSecondary waves ✓ Correct
CSurface waves
DNone of the above
Correct answer: (B) Secondary waves
Explanation
Secondary waves are S waves whose particle motion is transverse, at right angles to the direction of travel.
Primary waves are P waves with longitudinal, back-and-forth compressional motion, not transverse.
Surface waves travel along the ground surface and include rolling and side-to-side types, but are not the defined body S wave here.
Since secondary waves fit exactly, none of the above does not apply.
Being transverse, S waves cannot pass through liquids and are blocked by the outer core.
P waves arrive first because they move faster than the transverse S waves.
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