What is the nature of wave produced in a lake, due to an explosion inside the lake ?

Answer

To determine the nature of the wave produced in a lake due to an explosion inside the lake, we can analyze the situation step by step.

### Step 1: Identify the cause of the wave
An explosion occurs at the bottom of the lake. This explosion generates energy that propagates through the water.

**Hint:** Consider what happens when energy is released in a medium like water.

### Step 2: Understand wave types
Waves can be classified into two main types: longitudinal and transverse waves. Longitudinal waves are characterized by the displacement of the medium being parallel to the direction of wave propagation, while transverse waves have perpendicular displacement.

**Hint:** Recall the definitions of longitudinal and transverse waves and how they relate to the movement of particles in a medium.

### Step 3: Determine the type of wave produced
In the case of an explosion underwater, the energy released causes the water particles to move back and forth in the same direction as the wave travels. This motion creates areas of compression and rarefaction in the water.

**Hint:** Think about how particles in a medium respond to a sudden disturbance like an explosion.

### Step 4: Conclude the nature of the wave
Since the displacement of water particles is parallel to the direction of wave propagation, the wave produced in the lake due to the explosion is a longitudinal wave.

**Hint:** Reflect on the characteristics of the wave and how they relate to the definition of longitudinal waves.

### Final Answer
The nature of the wave produced in a lake due to an explosion inside the lake is a longitudinal wave.