Question:
The waves responsible for elongating and squeezing of the material while propagating are
The waves responsible for elongating and squeezing of the material while propagating are
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Seismic waves travel through the Earth in different ways. The way a wave moves the material it passes through tells us its type.
Updated On: Jun 16, 2026
- S − waves
- L − waves
- R − waves
- P − waves
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The Correct Option is D
Solution and Explanation
Concept:
Seismic waves travel through the Earth in different ways. The way a wave moves the material it passes through tells us its type.
Step 1:
P-waves (primary waves) are longitudinal waves. In a longitudinal wave the particles of the material vibrate back and forth in the same direction in which the wave travels.
Step 2:
This back-and-forth motion alternately compresses (squeezes) and stretches (elongates) the material as the wave passes. Hence the waves responsible for elongating and squeezing the material are the P-waves.
Answer: Option (4) — P − waves.
Seismic waves travel through the Earth in different ways. The way a wave moves the material it passes through tells us its type.
Step 1:
P-waves (primary waves) are longitudinal waves. In a longitudinal wave the particles of the material vibrate back and forth in the same direction in which the wave travels.
Step 2:
This back-and-forth motion alternately compresses (squeezes) and stretches (elongates) the material as the wave passes. Hence the waves responsible for elongating and squeezing the material are the P-waves.
Answer: Option (4) — P − waves.
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