Everyone loves playing with bubbles, but have you ever witnessed antibubbles? Antibubbles are essentially the opposite of regular bubbles: a layer of air traps a bubble of fluid inside. To create antibubbles, you have to mix up 2 different jars of soapy water. When you mix one fluid with the next, small antibubbles will form and slowly sink to the bottom. When an antibubble pops, the air barrier floats to the top of the suspended fluid, opposite of an actual bubble where the fluid drops to the ground due to gravity. Physics Girl will take you through the phenomena of antibubbles below.
You have probably heard of the milk, soap and food coloring trick, but using the same methodology you can create antibubbles that even roll on the surface of the milk. While this may be the first time that you have heard of antibubbles, you actually make them every time that you wash your hands, according to Science Alert.
Normal bubbles pop when the surface tension of the exterior fluid becomes too low to hold the internal air inside. Antibubbles on the other hand pop when the external pressure overcomes the attraction between the gas molecule barrier keeping the fluids separate. For a more detailed explanation you can always watch the video above.
[Image Source: Physics Girl]