When are the two bodies in thermal equilibrium?

Explanation

To determine when two bodies are in thermal equilibrium, we can follow these steps:

### Step 1: Understand the Concept of Thermal Equilibrium
Thermal equilibrium occurs when two bodies reach the same temperature, meaning there is no net heat transfer between them.

### Step 2: Apply the Zeroth Law of Thermodynamics
According to the Zeroth Law of Thermodynamics, if two bodies (let's call them Body 1 and Body 2) are in thermal contact and no heat is transferred between them, they are in thermal equilibrium.

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