It just becomes less powerful. And it moves into the food room. So microwaves which operate at 2. And what that means is that microwaves can be trapped inside of a grape. And so a grape is just the right size. It turns out to be exactly one wavelength of microwave radiation long. And outside of the grape, the microwave is much, much longer. So it kind of gets trapped and sucked into the grape. But when you bring two of these resonant modes close together— two grapes close together— they kind of bond.
So they kind of form a bonding mode right between them at the point of contact. I have a tweet from Darren, who says, OK, serious question. Would carrots do this, too? The carrots would have to be sliced or balled up into something roughly the size of grapes. And just the water bottle alone is able to do that.
Well, two, of them in contact are able to do this. So grapes are fine. Melon, olives, and blueberries. I have done it at home hundreds of times to no ill effect. And a lot of the scientists over the past few years believe that the skin bridge had something to do with the effect mechanistically.
But really, I think what we discovered is the skin bridge is just a way to keep the two hemispheres close together so that the grapes could bond in the same way that two whole grapes do work. So in all of our experiments, the grapes are in a little watch glass to bring them closer together.
Blitz it in the microwave for five seconds. For one glorious moment, the grape halves will produce a fireball unfit for domestic life. Off-camera, they discovered they had burned the interior of the physics department microwave.
But it turns out, even after millions of YouTube views and probably tens of scorched microwaves, no one knew exactly why the fireball forms.
Popular online explanations usually say that the grape halves act like an antenna, and they somehow direct microwaves onto the small bridge of skin to ignite the initial spark.
But nobody had actually done the math to prove it. After several summers of microwaving grape-shaped objects and simulating the microwaving of those objects, a trio of physicists in Canada may have finally figured it out. The fireball is merely a beautiful, hot blob of loose electrons and ions known as a plasma. The most interesting science is contained in the steps leading up to the plasma, they say.
Canadian researchers say they've come up with an answer, which they published this week in the journal Proceedings of the National Academy of Sciences. The first key is that grapes are mostly made of water.
Water bends microwaves and shortens their wavelength significantly because it has a high refractive index. The second is that half a grape, or even a whole grape, is just the right size "so that you can fit essentially one microwave wavelength inside the grape," said Pablo Bianucci, a physics professor at Concordia University in Montreal, who co-authored the paper.
The single microwave gets trapped inside the grape, where it bounces back and forth, heating up the grape half from the inside out — just the opposite of how foods normally heat in a microwave. If another grape half is nearby, the trapped microwaves can hop between them, generating a strong electromagnetic field.
That provides the energy for the electrons and ions to escape from the molecules inside the grapes and the air, producing a plasma. Bianucci said similar effects had been observed with much shorter wavelengths of light than microwaves in things much smaller than grapes, such as nanoparticles. By Emily Conover. April 2, at am. To cook up homemade plasma, all someone needs is a grape and a microwave oven. The effect makes for a spectacular kitchen fireworks display.
Heat the fruit in a microwave for a few seconds. Then, boom!
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