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I donβt know if itβs a stupid question or not but I have been wondering this myself for years. :)
Cold doesn't exist, it is merely the absence of heat. Easier to insert heat than remove it, same reason why you can put on warmer clothes in the winter, but you can't make yourself cold in the summer.
The reverse microwave. I heard you need a LOT of freon.
Falcoooone
Removing heat energy is what your freezer does, by transferring it outside of the freezer box.
You canβt just remove heat by adding electromagnetic energy. Absorbing energy from the electromagnetic radiation makes heat.
Edit: whelp, TIL
The magnetocaloric effect can do this. Instead of the target absorbing energy, the magnet does. The magnet heats up and the target cools.
If you're very careful you can remove heat with electromagnetic energy.
Think of heat like someone on a rope swing, and electromagnetic energy as a push.
If you time, and angle your pushes very carefully you can slow the person on the swing. But it's much easier to speed them up. Same with electromagnetic energy.
Fridge, well. But now I'm wondering if that would be possible with electromagnetic radiation somehow. Would it be possible to direct infrared waves away from a closed chamber, making the inside cooler? Like a semipermeable membrane in shoes with water vapor?
i would think not. unless waves can be tuned to cancel out background radiation, but that would only stop it from heating up more.
yeah, not only microwave but heater in general... but reversed, i asked myself that question for a long time, i mean we pump an electricity into the wire and we get heat, why not reverse? why we can "magically" get heat from electrons but to get something cold we need to pump the heat elsewhere, like microwave basically make atoms vibrate generating heat, would be cool to be able to generate some field that makes atoms stop
I've been wondering this for my entire life