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Scientists produce a rigorous study of why grapes Sparks in a microwave oven



Hydrogel spheres sparking as a result of microwave radiation
Photo: Hatak et al. a pair of hemispheres of grapes exposed to intense microwave radiation will ignite a flame. "It is truly recognized as universally acknowledged truth … but what causes this microwave wonder?

Sparks has become a popular YouTube trick. This new study by Canadian scientists shows that beneficial achievements can come from everywhere, even by studying something stupid.

"This is a regime that has not been studied before," says one of Pablo Biancuci, the author of the Concordia University in Montreal, told Gizmodo. The trick usually shows two halves of grapes linked to a thin layer of skin. After a few seconds of microwave, they start to glow. Although there are different explanations on the internet, researchers want to study the phenomenon more rigorously. They quickly realized that the skin of the grapes was not needed to produce sparks, as evidenced by the sparkles of hydrogel beads, which are held solely by the weight and shape of the antenna they are in, according to the study published in [Thespecificgeometryoftwotouchingwater-filledcircularobjectsintheelectromagneticfieldcreatesresonancesconcentratedatapointwherespheresorhemispheresintersectThisbecomesaverysmallpointwithhighenergydensityenoughtocreateplasmaofionsintheregionwheretheobjectsaretouched

Is the study worth publishing in a magazine as high profile as PNAS? The newspaper editor, a professor of chemistry at the University of Illinois, Katherine Murphy, has definitely thought of it. "The fact that they were rigorous enough to go through the peer review process is proof that they are doing a good job in technical terms," ​​she told Gizmodo.

But the newspaper is a lot more than a trick, "Murphy said. This type of focused energy study could find an important application in other targeted energy systems, such as explosives or high intensity laser pulses. In addition, the article presents a way to depict electric fields in these types of physical settings and can lead to advances in photonics more generally.

An abundance of strange things can provide useful scientific results if you apply strict thinking and conduct a well-thought experiment, as shown by this work. We are also aware that if you accidentally burn your house down the microwave grape, it's not my fault.


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