The setting sun appears higher in the sky than it really is

Explanation

### Step-by-Step Solution:

1. **Understanding Refraction**:
- Refraction is the bending of light rays when they pass from one medium to another due to a change in speed. The degree of bending depends on the nature of the mediums involved (rarer or denser).

2. **Atmospheric Layers**:
- The Earth's atmosphere consists of multiple layers with varying temperatures. The temperature affects the density of air; warmer air is less dense (rarer) than cooler air.

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