Civil Services Examination · प्रश्न 65
Consider the following statements: 1. In a seismograph, P waves are recorded earlier than S waves. 2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation. Which of the statements given above is/are correct?
उत्तर देखें और व्याख्या
उत्तर: (C) Both 1 and 2
व्याख्या
P waves are fastest and arrive first. P waves are longitudinal (particles move along the propagation direction), while S waves are transverse (particles move at right angles).