The figure below shows the cross-section of a diffusion cloud chamber used to detect radiation from radioactive sources.
![SekphycP2q18c](https://www.easyelimu.com/images/mockpastpapers/sukellemo_2020/SekphycP2q18c.PNG)
- State the function of the following:
- Alcohol.
- Solid CO2.
- Explain briefly how the diffusion cloud chamber can be used to detect and identify alpha particles.