When light travels from hot air to cold air, then:

Options

A. bends towards the normal
B. bends away from the normal
C. bends towards the normal and scatter
D. bends away from the normal and scatter

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept of Refraction**:
- Refraction is the bending of light as it passes from one medium to another with a different density. In this case, we are considering light traveling from hot air (less dense) to cold air (more dense).

2. **Identifying the Mediums**:
- Hot air is less dense compared to cold air. When light moves from a less dense medium (hot air) to a more dense medium (cold air), it will undergo refraction.

3. **Direction of Bending**:
- According to the laws of refraction, when light travels from a less dense medium to a more dense medium, it bends towards the normal line. The normal line is an imaginary line perpendicular to the boundary between the two mediums.

4. **Conclusion**:
- Therefore, when light travels from hot air to cold air, it bends towards the normal.

### Final Answer:
When light travels from hot air to cold air, it bends towards the normal.

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