Why do people say Quantum Mechanics is strange or weird?

Is it matter being two places at once?  

Matter being in state of not knowing.

Object is affected by the Observer looking at it.

Edited February 12, 20187 yr by nec209

The random teleporting of things like quarks and atoms.

The state of matter being two places at once.

The state of matter is in two different forms at once. (Wave and particle)

Stuff like that. Confusing.

However, mainly it's because it seems like magic, many of the concepts.

Once again, however, magic is just something we don't fully understand.

So yeah.

It's complicated to understand, therefore, it's strange. 

Like mindreading.

 

It is very counterintuitive, can only be described by complex mathematics, is nearly impossible to visualise properly, and can have flabberghasting philosophical consequences. 

One simple example: the double split experiment.  One electron (or photon) at a time at the double split results in the diffraction pattern.

13 hours ago, Raider5678 said:

The random teleporting of things like quarks and atoms.

teleportation refers to a specific phenomenon in QM, and it is not random, nor does it behave like Star Trek.

 

13 hours ago, Bender said:

It is very counterintuitive, can only be described by complex mathematics, is nearly impossible to visualise properly, and can have flabberghasting philosophical consequences. 

Impossible to visualize without practice. Once you learn QM and develop an understanding, visualization becomes easier.

14 hours ago, mathematic said:

One simple example: the double split experiment

Slit* - refers to the small cut in the paper or what have you.

1 hour ago, swansont said:

teleportation refers to a specific phenomenon in QM, and it is not random, nor does it behave like Star Trek.

 

Haha, very true.

As I said, it's not magic, just complicated.

 

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.

Niels Bohr
 

2 hours ago, Itoero said:

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.

Niels Bohr

Even if he said that (which he probably didn't), it may have been true 100 years ago but a lot of people educated since then just accept it as the perfectly normal way the world works.

11 hours ago, swansont said:

Impossible to visualize without practice. Once you learn QM and develop an understanding, visualization becomes easier.

Visualisation in your head does take some mind gymnastics, but I was mostly referring to countless attempts to produce images and videos to clarify QM concepts. I rarely find them satisfying. 

On ‎13‎-‎2‎-‎2018 at 7:39 PM, Strange said:

Even if he said that (which he probably didn't), it may have been true 100 years ago but a lot of people educated since then just accept it as the perfectly normal way the world works.

true, things I learned concerning entanglement I found amazing