The main difference between longitudinal and transverse waves in that

Options

A. diffraction can be observed only in longitudinal waves
B. interference phenomenon is possible only for transverse waves
C. only the transverse waves can be polarised and not the longitudinal waves.
D. reflection is observed only for transverse waves and not for longitudinal waves.

Answer

To solve the question regarding the main difference between longitudinal and transverse waves, we will analyze the options provided and understand the characteristics of each type of wave.

### Step-by-Step Solution:

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

2. **Analyze the Options**:
- **Option A: Diffraction can only be observed in longitudinal waves**.
- **Analysis**: This statement is incorrect. Diffraction occurs in all types of waves, including longitudinal and transverse waves.

- **Option B: Interference phenomenon is only possible for transverse waves**.
- **Analysis**: This statement is also incorrect. Interference can occur in both longitudinal and transverse waves.

- **Option C: Only transverse waves can be polarized and not longitudinal waves**.
- **Analysis**: This statement is correct. Polarization is a phenomenon that occurs only in transverse waves, as it involves the orientation of oscillations, which is not applicable to longitudinal waves.

- **Option D: Reflection is observed only for transverse waves and not for longitudinal waves**.
- **Analysis**: This statement is incorrect. Reflection occurs in both types of waves.

3. **Conclusion**:
- The correct answer is **Option C**: Only transverse waves can be polarized and not longitudinal waves.