Ant Manor January 28: Why are the surrounding walls easily blackened after being used for a long time?

php editor Xigua reveals the secret for you: Ant Manor January 28 Why do the surrounding walls of electric lamps easily turn black after being used for a long time? This phenomenon may be related to the heat generated by the light bulb causing dust and smoke to accumulate on the wall, and the light emitted by the light bulb hitting the wall, making it black. In addition, dust and smoke will cause a chemical reaction on the wall surface under the action of light, causing the wall color to darken.

Ant Manor Today’s Answer Summary

Ant Manor January 28: Why are the surrounding walls easily blackened after using electric lamps for a long time?

Question: Why are the surrounding walls easily blackened after the electric lamp has been used for a long time?

Answer: Particle deposition causes

Answer analysis:

1. The reason why oil lamps can blacken walls is that in addition to generating carbon particles, another important condition is the heat generated by the flame;

2. The heat drives the surrounding air to form a bottom-up convection movement, which becomes the driving force for the upward movement of carbon particles;

3. Electric lights, especially incandescent bulbs, also generate heat, thus forming upward air flow.

The above is the detailed content of Ant Manor January 28: Why are the surrounding walls easily blackened after being used for a long time?. For more information, please follow other related articles on the PHP Chinese website!