Q: छाया क्षेत्र मौजूद है क्योंकि
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The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core. There are two types of Shadow zones: one for P waves and one for S waves. P wave shadows between 104-140 degree, both sides; S wave shadow from 105 of one side to 105 of the other.