Buzz
This is one of those basic kitchen rules even novice cooks should know: Never put metal in the microwave. A viral image online has caused some to question this rule. The image shows a regular-sized penny alongside three smaller ones, with the caption: 'This is what happens when you microwave a penny for 2 minutes.' But according to Snopes, microwaving a penny won’t cause it to shrink—it could, however, damage your microwave beyond repair.
Microwave ovens work by reflecting microwaves inside a metal chamber. Some molecules, like those in your food, absorb these waves and convert them into heat. However, metals are a different story. Metal is rich in electrons, and when microwaves hit metal, these electrons become charged and deflect the waves. Rather than being absorbed, the microwaves bounce off the metal, causing electrical sparks. In some cases, these sparks can burn through the microwave's walls and damage the internal electronics.
Even if it were possible to shrink a penny in a microwave, the science behind microwaving metals should be enough to deter anyone from trying. Those tempted to recreate this viral myth will only end up disappointed. The image circulating on social media is a hoax, with Snopes revealing that the smaller pennies likely came from a magician's trick kit.
The post led some to spread their own false claims. One reply featured a picture of a melted microwave, allegedly ruined by the penny trick. However, this image, which has been circulating for years, actually originated from a blogger who accidentally set their microwave on fire while heating a pot of oil. While microwaving a penny might cause sparks and potentially damage your microwave, a massive explosion is highly unlikely. (Trust us on this one.)
