Solved UPSC CDS/OTA Question
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Q · EarthquakeMedium · 45s
Which one of the following is a ‘Shadow Zone’ for P-waves?
TopicEarthquake
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
← Previous questionQ 30 / 30
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Explanation:
P-waves have a small shadow zone from 103° to 142°, while S-waves have a larger shadow beyond 103°.
Final Answer: Option B — 142° to 180° from the epicenter