This image displays bubbles, or globules of gas, created from mixing Dawn dish soap and warm water together in a cup. The globules combine and cover the entire top surface of the cup, creating a foam of soap bubbles. Surface tension holds the bubbles and prevents them from popping. The thin layer of soap liquid encases air while surface tension minimizes surface area, creating a sphere. Additionally, there is a pressure difference between the inside and outside of the globule of air; the inside has a higher pressure than along the spherical curve of liquid. The Marangoni effect can describe the films of soap being created and the bubbles rising to the top of the cup. According to the Marangoni effect, fluid flows from areas of low surface tension to high surface tension, demonstrated by these bubbles.
Marangoni Effect Source: The Marangoni Effect: A Fluid Phenom
The camera used was an iPhone 14 Pro with the 48mm lens. ISO 160, F-Stop f/2.2, Exposure 1/67