Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : L waves are responsible for majority of the destructive earthquakes. Reason (R) : They are the surface waves and develope in the immediate vicinity of the epicenter. In the light of the above statements, choose the most appropriate answer from the options given below :
Examining Earthquake Waves: Assertion and Reason Analysis
This question asks us to evaluate two statements regarding earthquake waves, specifically L waves, and determine their correctness and relationship.
Analyzing Assertion (A): L Waves and Destructive Earthquakes
Assertion (A) states that L waves are responsible for the majority of destructive earthquakes. L waves, also known as Love waves, are a type of surface seismic wave. They cause the ground to move horizontally, perpendicular to the direction of propagation. Due to their large amplitudes and longer wavelengths compared to body waves (P and S waves), Love waves induce significant shaking, leading to considerable damage to structures and infrastructure. Therefore, this assertion is considered correct.
Analyzing Reason (R): Nature of L Waves
Reason (R) states that L waves are surface waves and develop in the immediate vicinity of the epicenter. Seismic waves travel from the earthquake's focus (hypocenter) through the Earth's interior (body waves) and then reach the surface. Surface waves, including Love waves and Rayleigh waves, are generated when these body waves interact with the Earth's surface, particularly near the epicenter. Love waves specifically travel along the Earth's surface. This description of L waves as surface waves developing near the epicenter is accurate. Thus, this reason is also considered correct.
Connecting Reason (R) to Assertion (A)
The reason explains why the assertion is true. Because L waves are surface waves and their motion is concentrated along the Earth's surface near the epicenter, they have a more pronounced and destructive effect on buildings and the landscape than body waves, which lose energy as they travel through the Earth. The fact that they are surface waves directly accounts for their destructive potential.
Therefore, both statements are correct, and Reason (R) provides the correct explanation for Assertion (A).
Final Answer Determination
- Assertion (A) is correct.
- Reason (R) is correct.
- Reason (R) correctly explains Assertion (A).
This aligns with Option 1.
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Important Questions from Mixed Topic (CUET PG)
- Kalpsutra, the illustrated canonical text is from:-
- The Harappan city almost exclusively devoted to craft production was-:
- Mohandas Karamchand Gandhi launched quit India movement after the failure of:-
- The "Objectives Resolution" was introduced in constituent assembly by:-
- Who among the following was not a member of the constituent assembly:-
