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In the context of an earthquake, consider the following statements regarding body waves and surface waves:
- Body waves are generated at the focus and move in all directions.
- Surface waves are more destructive than body waves.
- The velocity of waves is higher denser material.
Which of the statements given above are correct?
- a)1 and 2 only
- b)2 and 3 only
- c)1 and 3 only
- d)1, 2 and 3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In the context of an earthquake, consider the following statements reg...
The correct answer is option 'D'.
Explanation:
- Let's analyze each statement one by one to determine if it is correct or not.
1. Body waves are generated at the focus and move in all directions.
- This statement is correct. Body waves are seismic waves that travel through the Earth's interior. They are generated at the focus (the point within the Earth where the earthquake originates) and move in all directions. There are two types of body waves: primary waves (P-waves) and secondary waves (S-waves).
2. Surface waves are more destructive than body waves.
- This statement is correct. Surface waves are seismic waves that travel along the Earth's surface. They are slower than body waves but have larger amplitudes, which make them more destructive. Surface waves cause the most damage during an earthquake, as they produce the rolling and shaking motion that is felt on the ground.
3. The velocity of waves is higher in denser material.
- This statement is also correct. The velocity of seismic waves depends on the density and elastic properties of the material they are traveling through. In general, waves travel faster in denser materials. For example, P-waves travel faster in solid rock compared to liquid or gas, while S-waves cannot pass through liquids at all. Surface waves also have slower velocities compared to body waves due to the interaction with the Earth's surface.
Conclusion:
- Based on the analysis, all three statements are correct. Therefore, the correct answer is option 'D' - 1, 2 and 3.
Explanation:
- Let's analyze each statement one by one to determine if it is correct or not.
1. Body waves are generated at the focus and move in all directions.
- This statement is correct. Body waves are seismic waves that travel through the Earth's interior. They are generated at the focus (the point within the Earth where the earthquake originates) and move in all directions. There are two types of body waves: primary waves (P-waves) and secondary waves (S-waves).
2. Surface waves are more destructive than body waves.
- This statement is correct. Surface waves are seismic waves that travel along the Earth's surface. They are slower than body waves but have larger amplitudes, which make them more destructive. Surface waves cause the most damage during an earthquake, as they produce the rolling and shaking motion that is felt on the ground.
3. The velocity of waves is higher in denser material.
- This statement is also correct. The velocity of seismic waves depends on the density and elastic properties of the material they are traveling through. In general, waves travel faster in denser materials. For example, P-waves travel faster in solid rock compared to liquid or gas, while S-waves cannot pass through liquids at all. Surface waves also have slower velocities compared to body waves due to the interaction with the Earth's surface.
Conclusion:
- Based on the analysis, all three statements are correct. Therefore, the correct answer is option 'D' - 1, 2 and 3.
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Community Answer
In the context of an earthquake, consider the following statements reg...
- Earthquake waves are basically of two types - body waves and surface waves. Body waves are generated due to the release of energy at the focus and move in all directions traveling through the body of the earth. Hence, the name body waves. Hence, statement 1 is correct.
- The body waves interact with the surface rocks and generate a new set of waves called surface waves. These waves move along the surface.
- The velocity of waves changes as they travel through materials with different densities. The denser the material, the higher is the velocity. Their direction also changes as they reflect or refract when coming across materials with different densities. Hence, statement 3 is correct.
- The Surface waves are the last to report on a seismograph. These waves are more destructive as compared to body waves. They cause displacement of rocks, and hence, the collapse of structures occurs. Hence statement 2 is correct.
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In the context of an earthquake, consider the following statements regarding body waves and surface waves: Body waves are generated at the focus and move in all directions. Surface waves are more destructive than body waves. The velocity of waves is higher denser material.Which of the statements given above are correct?a)1 and 2 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'D'. Can you explain this answer?
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