एस तरंगों की अनुपस्थिति 105° के बाद क्यों निर्णायक मानी जाती है?
Why is the absence of S-waves beyond 105° considered decisive?
Explanation opens after your attempt
B. क्योंकि द्रव बाह्य क्रोड कतरनी तरंगों को सहारा नहीं देताBecause the liquid outer core does not support shear waves
Concept
S-waves do not pass through liquids so they form a large shadow zone. Exam tip: treat it as evidence of the liquid outer core.
Why this answer is correct
The correct answer is B. क्योंकि द्रव बाह्य क्रोड कतरनी तरंगों को सहारा नहीं देता / Because the liquid outer core does not support shear waves. S-waves do not pass through liquids so they form a large shadow zone. Exam tip: treat it as evidence of the liquid outer core.
Exam Tip
एस तरंगें द्रव में नहीं गुजरतीं इसलिए उनका बड़ा छाया क्षेत्र बनता है। परीक्षा में इसे बाह्य क्रोड की द्रव अवस्था का प्रमाण मानें।
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