/sci/ - Science & Math

>what are lasers?

>>6341184
Well shit, there's the transistor.

Well we got lasers, MRI machines and flash memory from it.

>>6341184
Things that absolutely depend on quantum theory to work:

>lasers
>transistors
>LEDs
>ordinary lightbulbs (the tungsten kind)
>MRI machines

>>6341195
How?

>>6341184
>quantum mechanics
What is this?

>>6341197

because electrons

>>6341201
http://en.wikipedia.org/wiki/Introduction_to_quantum_mechanics

Are the principles of quantum mechanics relevant on a macroscopic scale?

http://www.youtube.com/watch?v=y0Z5i9qMbd0

>>6341184
>Is quantum mechanics applicable to the real world or does it only work in theory?

Be honest anon, you just want to raise cat corpses as zombies.

>>6341204
Explain why the uncertainty principle happens

>>6341221
explain why the universe exists

>>6341223
>the universe exists
Care to back up that astronomical claim?

>>6341232
existence is not a predicate

>>6341223
it exists because (1) you can't logically have position and momentum without a privileged reference frame and (2) there are/were no privileged reference frames in existence

Does the uncertainty principle apply to theoretical concepts?

>>6341212

time 4 sum good ol copenhagen interpretation

how about we talk about my certainty principle instead?

>>6341282
Even then how can you be certain that is the topic?

>>6341197
>lasers

Lasers depend on the quantum physics of photons and how they interact with the energy levels of electrons. If energy levels weren't quantized, lasers wouldn't work.

>Transistors

Depend on the physics of electrons at a quantum level.

>LEDs

Same reason that transistors need it - they're also based on semiconductors.

>Ordinary lightbulbs

Explaining why things the glow the specific colors when they're hot that they do is one of the things quantum theory was first invented to explain.

>>6341274
Yes, see >>6341269

Try imagining position or momentum without any frame of reference. You can't.

Therefore the uncertainty principle is a logically necessary fact.

And as we all know the efficient cause of the universe is most probably the uncertainty principle.

>>6341287
What the fuck?
No, the uncertainty principle has to do with the fact that the position and momentum wavefunctions are fourier transforms.

>>6341184
>Is quantum mechanics applicable to the real world or does it only work in theory?
Fucking magnets dood.
Magnetism has a quantum origine.

It's only a theory (geuss)

Most of it is math without experimentally testable results, e.g. string theory.

>>6346488
2edgy4me