Give two difference between progressive wave and stationary wave.

Answer

To answer the question regarding the differences between progressive waves and stationary waves, we can break down the explanation into clear points:

### Step-by-Step Solution:

1. **Definition of Progressive Waves**:
- Progressive waves are waves that travel through a medium, transferring energy from one point to another. They can be either transverse or longitudinal waves. In these waves, all points on the wave move forward with time.

2. **Definition of Stationary Waves**:
- Stationary waves, also known as standing waves, are formed by the interference of two waves traveling in opposite directions. In stationary waves, certain points (nodes) remain fixed, while other points (antinodes) oscillate with maximum amplitude. The overall wave does not propagate through the medium.

3. **First Difference**:
- **Movement**:
- **Progressive Waves**: They move forward with time, meaning that the wave shape travels through the medium.
- **Stationary Waves**: They do not move from their position; the wave pattern remains fixed in space.

4. **Second Difference**:
- **Energy Transfer**:
- **Progressive Waves**: They carry and transfer energy and momentum as they propagate through the medium.
- **Stationary Waves**: There is no net transfer of energy or momentum; the energy is stored in the oscillation of the particles at the nodes and antinodes.

### Summary of Differences:
1. **Movement**:
- Progressive Waves: Move forward with time.
- Stationary Waves: Do not move; they remain fixed.

2. **Energy Transfer**:
- Progressive Waves: Transfer energy and momentum.
- Stationary Waves: Do not transfer energy or momentum.