What if there is no bubble water in the bubble gun? In fact, in daily life, there are many materials that can be made into water for blowing bubbles. For example, cut up soap and dissolve it in water, or add water with dishwashing essence or shampoo. It has been proved by experiments that the combination of soapy water, dishwashing essence and shampoo with relatively high concentration can make the blown bubbles more durable and not easy to break. Another way is to add a teaspoon of sugar or a little tea to the soapy water and put it in a dark place overnight. You will find that the bubbles blown out by this soapy water are not only bright in color, but also not easy to crack.

It is an interference phenomenon of light. When light passes through the film of soap bubbles, the top and bottom of the film will reflect. The soap film can contain about 150 different layers at most. The messy color combination we see is caused by the unbalanced film layer. The thickest film layer reflects red light, the thinnest reflects purple light, and the middle reflects seven-color light, so it will be colorful.