In folk knowledge, there are many tricks passed down from generation to generation. One of the notable ones is the “dominating” fly repellent method using a plastic bag filled with water and hung in front. This image is quite familiar, but do many people know the true principle behind it?
A plastic bag filled with water used to repel flies.
Indeed, this image is familiar and some netizens have humorously explained that when a fly flies into the plastic bag containing water, they will see their image reflected multiple times, so they get scared and fly away.
However, according to the scientific explanation, this fly repellent trick is also very reasonable. It is based on the characteristic that flies are attracted to daytime light. Due to the compound eyes of flies composed of many convex mirrors that reflect light quickly, you can hang plastic bags filled with water to repel flies. During the day, when flies hover around to find a landing spot, if they encounter the reflected light from the plastic bags containing water, they will lose their ability to orient themselves and fly into the house. This is a fly repellent method that has been used for a long time.
Have you ever tried this fly repellent method?
According to Báo đất việt.
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