Which not correctly matched

Options

A. Light tranverse wave
B. Sound Longitudinal mechanical wave
C. Light Progressive wave
D. Sound Longitudinal non-mechanical wave

Answer

To solve the question "Which is not correctly matched?" regarding the properties of waves, we need to analyze the given options based on the definitions of different types of waves.

### Step-by-Step Solution:

1. **Identify the Types of Waves**:
- **Transverse Waves**: In these waves, the particle displacement is perpendicular to the direction of wave propagation. An example is light waves.
- **Longitudinal Waves**: In these waves, the particle displacement is parallel to the direction of wave propagation. An example is sound waves.

2. **Differentiate Between Mechanical and Non-Mechanical Waves**:
- **Mechanical Waves**: These require a medium (solid, liquid, or gas) to propagate. Sound waves are mechanical waves because they cannot travel through a vacuum.
- **Non-Mechanical Waves**: These do not require a medium to propagate. Light waves are non-mechanical waves and can travel through a vacuum.

3. **Analyze Each Option**:
- **Option 1**: Light transverse wave - This is correctly matched because light is indeed a transverse wave.
- **Option 2**: Sound longitudinal mechanical wave - This is also correctly matched because sound is a longitudinal wave and is mechanical.
- **Option 3**: Light progressive wave - This is correctly matched as light waves can propagate.
- **Option 4**: Sound longitudinal non-mechanical wave - This is NOT correctly matched because sound is a mechanical wave, not a non-mechanical wave.

4. **Conclusion**:
- The fourth option is the incorrect match. Therefore, the answer to the question "Which is not correctly matched?" is that the statement "Sound longitudinal non-mechanical wave" is not correctly matched.

### Final Answer:
The option that is not correctly matched is: **Sound longitudinal non-mechanical wave**.

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