Question

Match LIST-I with LIST-II (Seismic Waves):\[\begin{array}{|c|c|} \hline \textbf{LIST-I (Type of seismic wave)} & \textbf{LIST-II (Characteristic of particle motion)} \\ \hline \text{A. Primary Wave} & \text{III. in longitudinal direction} \\ \hline \text{B. Shear Wave} & \text{IV. is perpendicular to the direction of wave propagation} \\ \hline \text{C. Love Wave} & \text{I. in horizontal plane and transverse to the direction of wave propagation} \\ \hline \text{D. Rayleigh Wave} & \text{II. in vertical plane and retrograde} \\ \hline \end{array}\]

• A. A - I, B - II, C - III, D - IV
• B. A - I, B - III, C - II, D - IV
• C. A - I, B - II, C - IV, D - III
• D. A - III, B - IV, C - I, D - II

Hint:

Remember: P → longitudinal, S → transverse, Love → horizontal transverse, Rayleigh → retrograde elliptical motion.

Answer 1

The Correct Option is D

Step 1: Seismic Wave Properties.
- Primary (P) waves: Longitudinal waves, particle motion aligns with propagation direction (III).
- Shear (S) waves: Transverse waves, particle motion perpendicular to propagation (IV).
- Love waves: Transverse waves with only horizontal particle motion (I).
- Rayleigh waves: Waves with retrograde elliptical particle motion in a vertical plane (II).

Step 2: Mapping.
- A corresponds to III
- B corresponds to IV
- C corresponds to I
- D corresponds to II

Step 3: Final Determination.
The correct correspondence is (D).