To Physics Lovers - What is Spin?

[Shringarey]

This is a question that has bogged be for quite some time. It is for all science lovers. The question is "What is Spin??"

Let me explain. I know that particles that have a spin of 1, have to be rotated by 360 deg to get their orifinal config back. Spin 2 means they have to be rotated by 180 deg (there is symmetry).

Now an electron has spin as 1/2. They say you have to rotate it twice fully (720 deg) to get the same config back. I dont understand this. I thought any object, rotated by 360 deg would be i original orientation.


Can anyone explain? Dhurrustien??

[PeaceSeeker]

This is a question that has bogged be for quite some time. It is for all science lovers. The question is "What is Spin??"

Let me explain. I know that particles that have a spin of 1, have to be rotated by 360 deg to get their orifinal config back. Spin 2 means they have to be rotated by 180 deg (there is symmetry).

Now an electron has spin as 1/2. They say you have to rotate it twice fully (720 deg) to get the same config back. I dont understand this. I thought any object, rotated by 360 deg would be i original orientation.


Can anyone explain? Dhurrustien??
shringji,
sorry no answer from my side.
i am a physics lover. but sadly didnt/couldnt explore that interest after school, rozi-roti ka chakkar you know:cry:
particles having of spin 1, 2 or 1/2, which particular area of physics/chemistry is this?

[sunnykode]

May be this will help
Link (http://www.newton.dep.anl.gov/askasci/chem99/chem99297.htm)

[Shringarey]

SunnyKode,

Link Bouncer gayaa. Tu samzhaa na

[2gud]

I don't have time to explain you, right now, but this needs a good amount of explanation. A nice lucid and elaborate explanation for people of patience...

http://scienceblogs.com/principles/2010/07/electron_spin_for_toddlers.php

[krantikari]

This is a question that has bogged be for quite some time. It is for all science lovers. The question is "What is Spin??"

Let me explain. I know that particles that have a spin of 1, have to be rotated by 360 deg to get their orifinal config back. Spin 2 means they have to be rotated by 180 deg (there is symmetry).

Now an electron has spin as 1/2. They say you have to rotate it twice fully (720 deg) to get the same config back. I dont understand this. I thought any object, rotated by 360 deg would be i original orientation.


Can anyone explain? Dhurrustien??


I will add more complexity...

Compare an electron in 1s2 and the other in 3d10. Do you define spin as same for both? What the f happens to an electron that is hit by a photon that jumps to the higher orbital... does it keep spinning like it did in its home street ? The +1/2 and -1/2 spin of electrons did bother me a bit.. then I decided to understand it this way - starting from point A in an orbital, to reach back to point A, wrt nucleus centre, electron does half a spin... This is no matter which bloody orbital that electron is patroling. Not sure this is correct... but it did give me some good sleep during those days.

[AmthaLal]

Spin is explained here (http://www.urbandictionary.com/define.php?term=spin). :D:D

[dhurandhar]

This is a question that has bogged be for quite some time. It is for all science lovers. The question is "What is Spin??"

Let me explain. I know that particles that have a spin of 1, have to be rotated by 360 deg to get their orifinal config back. Spin 2 means they have to be rotated by 180 deg (there is symmetry).

Now an electron has spin as 1/2. They say you have to rotate it twice fully (720 deg) to get the same config back. I dont understand this. I thought any object, rotated by 360 deg would be i original orientation.


Can anyone explain? Dhurrustien??

Quantum mechanics is not my area of expertise....therefore, I suggest the following:

http://hyperphysics.phy-astr.gsu.edu/hbase/spin.html

http://www.electronspin.org/electron.pdf

[Shringarey]

Yaar, when it comes to quantum mechanics, I get lost.

[dhurandhar]

Yaar, when it comes to quantum mechanics, I get lost.

You may want to read, 30 years that shook physics, by George Gamow. That is a very lucid explanation of quantum mechanics as it emerged due to crises in classical physics.

[Arbaaz Balushi]

I saw one demo at a science museum and it still amazes me. Physics enthusiast here could explain the funda behind it.

It is – a source of light – the light falls on a screen and also on the screen you can see some balls (shadow) falling. If a person stands between the light source and screen, these balls accumulate on that person’s head and shoulder, if he cups his palm, these falling balls accumulate there (all in images at the screen). When it is filled, the excess falls down.

I don’t know if I have explained well, there is one at chicago science museum too. May be amthalal could explain the demo further.

What is the principle behind it?