Which of the following statements with reference to shadow zones in an event of an earthquake is/are correct ? 1. Zone between 105° and 145° from epicentre was identified as the shadow zone for both P-waves and S-waves 2. The shadow zone of P-waves is much larger than that of the S-waves Select the answer using the code given below :

  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2

Correct Answer: A. 1 only

Explanation

The zone between 105° and 145° is a shadow zone for both P and S waves. However, the shadow zone of S-waves (beyond 105°) is much larger than that of P-waves.

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