Question

Can someone explain this? ΔxΔp≥h/2

Answer 1

heisenberg uncertainty principle

Answer 2

Watch mystery of light by walter lewin, it will give you good knowledge about light including this heisenberg uncertainty principle.

Answer 3

But can't you briefly explain it here?

Answer 4

it tells about the uncertainty in momentum and position of small particles

Answer 5

like photons and atoms?

Answer 6

turing come to twiddla i need u

Answer 7

http://www.twiddla.com/712316

Answer 8

It is the limit of experimental detection. No device even theoretically can possible have a greater accuracy than this. x is positions, p is momentum, and h is Planck's constant 6.62x10^(-34). This equation shows that experimental detection will always have one or the other as a limiting agent. If we want a high degree accuracy measurement for the position, the momentum becomes more vague. If we want a very specific measurement for the momentum, the measurement of the position will be uncertain.
Since the product of these two measurements are are limited by the number 1/2 Planck's constant (which is very small), this fact has little effect on macroscopic objects. Even the effect on atoms is quite small. It's only on the level of electrons or smaller that this inequality really starts to matter.
I wish I was a quantum physicist and could tell you more, but I'm not, so here's wiki:
http://en.wikipedia.org/wiki/Uncertainty_principle
Look at the argument's like "Heisenberg's microscope" to get an idea on the origin of these ideas.

Answer 9

as for you arvind I'll look, but I just woke up, so who know is I can help.

Answer 10

I have a few questions on that, what is plancks constant good for, is it like the pi of momentum? What is experimental detection?

Answer 11

it is smallest quantity of energy

Answer 12

comes in package called quanta

Answer 13

Isn't that "quant"?

Answer 14

quanta is plural, singular in quantum

Answer 15

Oh, so does that mean that quantum mechanics is about the energy in photons and atoms and such?

Answer 16

yeah, it is physics of very small

Answer 17

where things act sometime like wave , other time like particle

Answer 18

That should be the most important part of phisyics, right?

Answer 19

yes, but also very difficult

Answer 20

Im sure its worth it, i mean if you have a better understanding of the smallest particles of physics you should find more answers about regular physics right?

Answer 21

I think so, but you should know classical physics well before learning quantum

Answer 22

Aw.. How well are we talking about, college level? Can i boost my knowledge in some way?

Answer 23

yes, I recommend watching lewin's lecture series . There are three series ; the third one deal with wave so it should get you started on this stuff

Answer 24

So yes to the college level? Where can i find lewins lectures?

Answer 25

mechanics series
http://www.youtube.com/watch?v=PmJV8CHIqFc

electricity and magnetism
http://www.youtube.com/watch?v=3omwHv3Cmog

wave
http://www.youtube.com/watch?v=OvDePn41fPY

Answer 26

Also this is from one of the pioneer of quantum mechanics/electrodynamics
http://www.youtube.com/watch?v=QeBkMzSLA8w

Answer 27

Should i take mechanics first?

Answer 28

yes