How will you prove that
the non-luminous zone of a candle flame is the hottest zone?

Explanation

To prove that the non-luminous zone of a candle flame is the hottest zone, follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of a Candle Flame**:
- A candle flame has three distinct zones: the luminous zone (inner yellow part), the non-luminous zone (outer blue part), and the zone of incomplete combustion (between the two). The non-luminous zone is characterized by a blue color and is located at the outermost part of the flame.

2. **Gather Materials**:
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