Jagan is creating an innovative hall called "The Hall of Echoes", and wants to add
things to the hall that would increase echoes. Which of these objects could he add ?

Options

A. Curtains
B. Gunny bags
C. Pillows
D. Walls

Answer

To determine which objects Jagan should add to "The Hall of Echoes" to increase echoes, we need to understand the concept of sound reflection and how echoes are produced.

### Step-by-Step Solution:

1. **Understanding Echoes**:
- An echo is produced when sound waves reflect off a surface and return to the listener. This means that for an echo to occur, there must be a hard surface that can reflect sound.

2. **Identifying Hard vs. Soft Surfaces**:
- Hard surfaces (like walls, concrete, or metal) reflect sound waves effectively, leading to a clearer and stronger echo.
- Soft surfaces (like curtains, pillows, or gunny bags) absorb sound waves, which reduces the chances of reflection and, consequently, the echo.

3. **Choosing the Right Objects**:
- Jagan should focus on adding objects that are hard and can reflect sound waves.
- Examples of suitable objects include:
- Walls (if they are hard and not covered with soft materials)
- Mirrors (as they are hard and smooth)
- Wooden panels (if they are solid)
- Glass surfaces (like windows)

4. **Avoiding Soft Materials**:
- Jagan should avoid adding soft materials such as:
- Curtains
- Cushions
- Gunny bags
- These materials will absorb sound and reduce the echo effect.

5. **Conclusion**:
- To increase echoes in "The Hall of Echoes", Jagan should add hard surfaces that can reflect sound effectively.