Which of the following types of waves is different from others?

Options

A. Light waves
B. X-rays
C. Radio waves
D. Sound waves

Explanation

To determine which type of wave is different from the others among light waves, X-rays, radio waves, and sound waves, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Waves**:
- We have four types of waves: Light waves, X-rays, Radio waves, and Sound waves.

2. **Classify the Waves**:
- Light waves, X-rays, and Radio waves are all classified as electromagnetic waves.
- Sound waves are classified as mechanical waves.

3. **Understand Electromagnetic Waves**:
- Electromagnetic waves are produced by the vibrations of electric and magnetic fields. They can travel through a vacuum and do not require a medium.

4. **Understand Longitudinal Waves**:
- Sound waves are longitudinal waves, meaning that the oscillation of particles occurs in the same direction as the wave propagation. They require a medium (solid, liquid, or gas) to travel.

5. **Compare the Waves**:
- Since Light waves, X-rays, and Radio waves are all electromagnetic waves, they share similar properties.
- Sound waves, being longitudinal and mechanical, are fundamentally different from the other three.

6. **Conclusion**:
- Therefore, the wave that is different from the others is the Sound wave.

### Final Answer:
The sound wave is different from the others (Light wave, X-ray, and Radio wave) because it is a longitudinal mechanical wave, while the others are electromagnetic waves.

---