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The reverse microwave. I heard you need a LOT of freon.
Falcoooone
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.
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 donβt know if itβs a stupid question or not but I have been wondering this myself for years. :)
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
Heat is energy release, your start with stored energy and release it. To make something cold you either have to capture energy (hard) or move it away (heat pump / refrigeration)
Laser setups that can cool individual atoms exists but they're not trivial whatsoever and they cool them by canceling atomic movement by hitting them with lasers opposing their current momentum to slow them down (cooling). It can not be scaled up in any practical way.
I've been wondering this for my entire life