NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Studies
NDA 2025 · General Ability · General Studies
Which of the following statements with reference to L-Wave or Long...
Which of the following statements with reference to L-Wave or Long Wave generated by an earthquake is/are correct?
1. They follow the Earth's circumference
2. They travel at more or less at a constant rate
Select the answer using the code given below:
1. They follow the Earth's circumference
2. They travel at more or less at a constant rate
Select the answer using the code given below:
Options
- A1 only
- B2 only
- CBoth 1 and 2
- DNeither 1 nor 2
Correct answer
C. Both 1 and 2
Step-by-step solution
L-waves or Long waves are surface waves generated by an earthquake.
They travel along the surface of the Earth, which means they follow the Earth's circumference. Thus, statement 1 is correct.
Unlike body waves (P and S waves) whose velocities increase with depth due to the increasing density and rigidity of the Earth's interior, L-waves travel through the relatively uniform surface layers (crust). Therefore, they travel at a more or less constant rate. Thus, statement 2 is also correct.
Both statements 1 and 2 are correct.
Answer: Both 1 and 2
They travel along the surface of the Earth, which means they follow the Earth's circumference. Thus, statement 1 is correct.
Unlike body waves (P and S waves) whose velocities increase with depth due to the increasing density and rigidity of the Earth's interior, L-waves travel through the relatively uniform surface layers (crust). Therefore, they travel at a more or less constant rate. Thus, statement 2 is also correct.
Both statements 1 and 2 are correct.
Answer: Both 1 and 2