### Identifying the Correct Answer

1. **Understanding Longitudinal Waves**
Longitudinal waves consist of alternating regions of compression and rarefaction. In such waves, particles of the medium move parallel to the direction of wave travel.

2. **Compression and Rarefaction**
- **Compression**: This is the region in a longitudinal wave where particles are closest together due to the wave's energy pushing them forward.
- **Rarefaction**: This is the less-dense region where particles are spread apart, representing areas of reduced air pressure.

3. **Conclusion**
Based on the definitions, the less-dense region of a longitudinal wave is known as a rarefaction.

### Final Answer
The correct answer is **rarefaction**.

Question

### Identifying the Correct Answer

1. **Understanding Longitudinal Waves**  
   Longitudinal waves consist of alternating regions of compression and rarefaction. In such waves, particles of the medium move parallel to the direction of wave travel.

2. **Compression and Rarefaction**  
   - **Compression**: This is the region in a longitudinal wave where particles are closest together due to the wave's energy pushing them forward.
   - **Rarefaction**: This is the less-dense region where particles are spread apart, representing areas of reduced air pressure.

3. **Conclusion**  
   Based on the definitions, the less-dense region of a longitudinal wave is known as a rarefaction.

### Final Answer
The correct answer is **rarefaction**.

Knowee AI · Accepted Answer

### Identifying the Correct Answer

1. **Understanding Longitudinal Waves**  
   Longitudinal waves consist of alternating regions of compression and rarefaction. In such waves, particles of the medium move parallel to the direction of wave travel.

2. **Compression and Rarefaction**  
   - **Compression**: This is the region in a longitudinal wave where particles are closest together due to the wave's energy pushing them forward.
   - **Rarefaction**: This is the less-dense region where particles are spread apart, representing areas of reduced air pressure.

3. **Conclusion**  
   Based on the definitions, the less-dense region of a longitudinal wave is known as a rarefaction.

### Final Answer
The correct answer is **rarefaction**.

The less-dense region of a longitudinal wave is called a _______.Multiple choice question.troughcrestcompressionrarefaction

Question

The less-dense region of a longitudinal wave is called a _______.

Solution

Identifying the Correct Answer

Final Answer

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