Consider the following statements with respect to the earth 39 s interior 1 The earth 39 s core refr...........

Geography Earth Geology

Consider the following statements with respect to the earth's interior:

1. The earth's core refracts/reflects the earthquake waves and a shadow zone is caused.

2. None of the earthquake waves reach the region between 103 degree and 143 degree angular distances from the focus of the earthquake.

3. Shadow zone of primary wave is larger than that of the secondary waves.

Which of the above statements is/are correct?

1 only

2 only

1&2 only

All the above

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Explanation:

Shadow zone of Primary waves is smaller than that of the secondary waves because primary waves are refracted by the earth's core and can reach the other side of the earth. On the other hand, Secondary waves cannot enter the arth's core and have larger shadow zone.