Which one of the following statements is true

Options

A. Both light and sound waves in air are transverse
B. The sound waves in air are longitudinal while the light waves are transverse
C. Both light and sound waves in air are longitudinal
D. Both light and sound waves can travel in vacuum

Answer

To determine which statement is true regarding light and sound waves, we can analyze each statement based on the properties of these waves.

### Step-by-Step Solution:

1. **Understanding Wave Types**:
- **Transverse Waves**: In transverse waves, the oscillation of the medium is perpendicular to the direction of wave propagation. An example of this is light waves, which are electromagnetic waves and do not require a medium to travel.
- **Longitudinal Waves**: In longitudinal waves, the oscillation of the medium is parallel to the direction of wave propagation. Sound waves are an example of longitudinal waves and require a medium (like air) to travel.

2. **Analyzing the Statements**:
- **Statement 1**: "Both light and sound waves in air are transverse."
- This is incorrect because sound waves are longitudinal, not transverse.

- **Statement 2**: "The sound waves in air are longitudinal while the light waves are transverse."
- This is correct. Sound waves are indeed longitudinal, and light waves are transverse.

- **Statement 3**: "Both light and sound waves in air are longitudinal."
- This is incorrect because light waves are transverse.

- **Statement 4**: "Both light and sound waves can travel in vacuum."
- This is incorrect because sound waves require a medium to travel and cannot propagate in a vacuum, while light can travel in a vacuum.

3. **Conclusion**:
- The only true statement among the options provided is **Statement 2**: "The sound waves in air are longitudinal while the light waves are transverse."

### Final Answer:
The correct answer is **Statement 2**.

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