Quantum Mechanics
Quantum mechanics that can be seen in every-day life

Quantum Mechanics

Technology younger than fifty years old. There are a lot of well-established, well-known (in the scientific community) quantum mechanical effects that are in use in almost every fancy device devised since the forties. This includes things like lasers (Bose-Einstein statistics), tunnel diodes (quantum tunnelling), LED lights, and of course exotic stuff like quantum computers. Unfortunately, the quantum-ness of modern technology is generally pretty well hidden (and thus: boring).Using cell phones inside (diffusion) Ever successfully use a cell phone while inside? Radio waves are huge, so is very apparent. They can ooze around corners (to some extent), and permeate (non-conductive) materials. It’s a little tricky to describe why radios (including cells phones, wifi signals, etc.) work even when there’s no line-of-sight between the sender and receiver, and especially tricky to describe why they work when there’s no path at all (for example, being in a windowless room with the door closed). I wish I could say it’s quantum tunnelling (because that would be awesome), but it’s not quite that. It’s similar to the fact that very long, slow ocean waves will cause your boat to rise and fall as a whole, but very short ocean waves are blocked by things like a boat. Radio waves tend to be about the size of buildings and when they come along, rather than just hitting the walls and bouncing off or getting absorbed, they “raise and lower” the electromagnetic field of the whole area. Already it’s practically impossible to describe radio waves in terms of particles.#Charlie R Wheaton

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