The density of a cloud created in a bottle does depend on pressure, but the relationship is complex and not defined by a simple formula. While the vapor amount remains constant, changes in pressure affect the expansion and temperature, influencing cloud density. For measuring cloud density, one suggestion is to assess the amount of light passing through the cloud, which correlates with density. Additionally, controlling the length of light travel through the cloud can provide a more manageable variable than droplet density. Ensuring uniform density throughout the cloud and addressing repeatability are important considerations for the experiment.
