How is ozone formed in the stratosphere?

Explanation

### Step-by-Step Solution:

1. **Understanding Ozone Formation**: Ozone (O₃) is formed in the stratosphere, which is a layer of the Earth's atmosphere. It plays a crucial role in protecting the Earth from harmful ultraviolet (UV) rays emitted by the Sun.

2. **Role of Ultraviolet Rays**: The process begins when ultraviolet rays from the Sun interact with molecular oxygen (O₂) present in the stratosphere.

3. **Dissociation of Oxygen Molecules**: The UV radiation provides enough energy to break the bonds in O₂ molecules, resulting in the formation of two individual oxygen atoms. These atoms are referred to as nascent oxygen.

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