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InterviewSolution
| 1. |
Why do earthquakes waves developed shadow zone? |
| Answer» The earthquake waves develop shadow zones because:(i)The P and S waves follow a curved path in the interior of the earth which proves that the density increases inside theearth.(ii)P and S waves are recorded along the surface near the focus of the earthquake. Beyond the depth of 2900 km ‘S’ wavedisappear and P waves travel with reduced velocity(iii)On reaching the core ‘S’ waves disappear and P waves are refracted as a result there is no wave for a distance. Thisarea is known as shadow zone. Normally it is found between 105° to 145°. | |