Can someone tell me planck constant?

[Alexander~E=hv]

Every time i see it it's different. I want the full Planck constant(every number) and is there any proof for the constant?

 

[Arbaaz]

The Planck constant is:
6.63 x 10^-34 J•s

The symbol is "h". You will have different values depending on the units used. For example, Planck Constant is also:

4.135667516(91) x 10^-15 in eV•s

There are various proofs of the constant on the internet. A lot of the ones I see are experimental proofs.

 

[Simon Bridge]

Every time i see it it's different. I want the full Planck constant(every number) and is there any proof for the constant?

Nobody can comply with your request because nobody knows every digit - nobody can measure that accurately.
You can look up the standard value online. I don't know of sources disagreeing, can you supply an example?
There are many proofs for the constant - you can look those up too.
Do you have reason to suspect that it may not be?

Uh OK - in SI units: 6.62606957 × 10^-34 m2 kg / s But in unified units it is 1.
So, in that sense, you can know every digit ...

AS for proofs - see:
http://iopscience.iop.org/0034-4885/76/1/016101

 

[Arbaaz]

Nobody can comply with your request because nobody knows every digit - nobody can measure that accurately.

You can look up the standard value online. I don't know of sources disagreeing, can you supply an example?

There are many proofs for the constant - you can look those up too.

Do you have reason to suspect that it may not be?

Ah I missed the "whole digit thing". Yeah, I agree with Simon! There isn't someone who actually knows every digit of the Planck constant.

 

[Alexander~E=hv]

Thank you all for the answers

 

[ZapperZ]

An extremely strange request.

Zz.

 

[Simon Bridge]

I don't know - there are similar requests...
https://www.physicsforums.com/showthread.php?t=128003
https://www.physicsforums.com/showthread.php?t=708282

It's the "every time I see it it's different" part that had me prick my ears up - but I canvassed popular sources and did not find disagreement. One wonders where Alexander~E=hv has been looking... but it seems that he is not willing to say...

 

[Nick O]

David J. Griffiths's Introduction to Quantum Mechanics defines hbar=h/(2pi) =1.05x10^(-34)J•s, and calls it "Planck's constant" before backing up and calling it "his original constant (h) divided by 2pi."