To determine which type of wave requires a medium to travel, we first need to understand the nature of the waves mentioned:

1. **Sound Waves**: Sound is a mechanical wave that requires a medium (solid, liquid, or gas) to propagate. It cannot travel through a vacuum.

2. **Gamma Rays**: These are electromagnetic waves and do not need a medium. They can travel through a vacuum.

3. **Microwaves**: Also an electromagnetic wave, microwaves can travel through a vacuum and do not require a medium.

4. **Radio Waves**: Like microwaves and gamma rays, radio waves are electromagnetic waves and can travel through a vacuum.

### Final Answer
The correct answer is **A. Sound**, as it is the only wave that requires a medium to travel.

Question

To determine which type of wave requires a medium to travel, we first need to understand the nature of the waves mentioned:

1. **Sound Waves**: Sound is a mechanical wave that requires a medium (solid, liquid, or gas) to propagate. It cannot travel through a vacuum.

2. **Gamma Rays**: These are electromagnetic waves and do not need a medium. They can travel through a vacuum.

3. **Microwaves**: Also an electromagnetic wave, microwaves can travel through a vacuum and do not require a medium.

4. **Radio Waves**: Like microwaves and gamma rays, radio waves are electromagnetic waves and can travel through a vacuum.

### Final Answer
The correct answer is **A. Sound**, as it is the only wave that requires a medium to travel.

Knowee AI · Accepted Answer

To determine which type of wave requires a medium to travel, we first need to understand the nature of the waves mentioned:

1. **Sound Waves**: Sound is a mechanical wave that requires a medium (solid, liquid, or gas) to propagate. It cannot travel through a vacuum.

2. **Gamma Rays**: These are electromagnetic waves and do not need a medium. They can travel through a vacuum.

3. **Microwaves**: Also an electromagnetic wave, microwaves can travel through a vacuum and do not require a medium.

4. **Radio Waves**: Like microwaves and gamma rays, radio waves are electromagnetic waves and can travel through a vacuum.

### Final Answer
The correct answer is **A. Sound**, as it is the only wave that requires a medium to travel.

Which of the following wave would need a medium to travel on?AsoundBgamma rayCmicrowaveDradio wave