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The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case



 
 
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  #21  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Dirk Van de moortel
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case


"Y.Porat" wrote in message oups.com...
i am a graduate of the Israeli Institute of technology
that is called Technion in Haifa
two of its Professors got a Nobel last year
and now i am a pensioner after 40 years of fruitful engineering work


Uh oh.

Dirk Vdm


Ads
  #22  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
dda1
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Posts: 1,168
Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case


Y.Porat wrote:
a very good advice
but i would like to know from who is that greate advice
can we know whop are you and why are you just a ****en dda1may be
youar ejust another incarnation of our famous Gisse ??
or may be a lose friend of him ??
and what about some physics Eh ??
bt wdo you have some reasons to hide your identity ??
may be some good reasons ??
and why do you answer instead of Gisse ??
do you think he cant speak for himself ??

TIA
Y.Porat
---------------


No physics for you. Stay retired. You are descending in dementia.

  #23  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Y.Porat
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case

you ddint answer my question
wht was the formula they used to convert
1.2 * 10-51 gram mass to 6.7 *10-19 Ev ?
in those experimental measurments

TIA
Y.Porat
------------------------

  #24  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Randy Poe
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case


Y.Porat wrote:
right


What's right?

and what is the physical meaning fo r you of pc??


Personal Computer.

Who are you talking to? Why don't you quote some context?

- Randy

  #25  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Y.Porat
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Posts: 7,286
Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case

lier !!
you ar enot American !!!


btw is there anyone here that can approve is what Gisse said
about his being a student ?

if a student how can he sit all day next to the computer
and bother nonstop other people with his pigg behaviour ??


TIA
Y.Porat
----------------------

  #26  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Y.Porat
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Posts: 7,286
Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case

and if you get a nonsero value for E waht will you say then ??

as in the link i brought above ?

TIA
Y.Porat
----------------

  #27  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Y.Porat
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Posts: 7,286
Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case

and some physics ??

what is the formula that they used to convert
photon mass to EV ??

TIA
Y.Porat
---------------

  #28  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
faceless
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case

E=mc^2
m=E/c^2=(6.7*10^-19*1.6*10^-19)/(9*10^16)=1.2*10^-54 kg=1.2*10^-51 g

  #29  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
Golden Boar
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case


Randy Poe wrote:
Y.Porat wrote:
so we have at least one step forwards

pc is actually mc^2 th e famous old one again !!!


Nope. pc and mc^2 are not in general the same.


If pc is not mc^2, then it is either hc/lambda or E, and E = hf = hc /
lambda.
So pc = hc / lambda.

We now have,

E^2 = 0^2 + h^2.f^2, or
E = hf


E=mc^2 even if you put m=0 you got it back
at the back door !!!


Nope. If you put m=0 into E=mc^2 you get E=0
(which is incorrect, because E = mc^2 is incorrect).

only that this time you enjoy the croocked situation
that you dont have mass
AND YOU DO HAVE MASS !!
AND YOU JUST CALLED IT 'RELATIVISTIC MASS !!


Nope. That term is not used in practice, though it remains
in some texts.

0 for 3.

- Randy


  #30  
Old May 9th 06 posted to sci.physics,sci.physics.relativity,sci.physics.particle
PD
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Default The formula E^2=(mc^2)^2 + ((pc)^2 is not valid for the photon case


Y.Porat wrote:
and some physics ??

what is the formula that they used to convert
photon mass to EV ??

TIA
Y.Porat
---------------


They don't use a formula. They use a conversion factor.

You don't use a formula to convert inches to meters. You use a
conversion factor. You don't use a formula to convert horsepower to
watts. You use a conversion factor. You don't use a formula to convert
joules to eV. You use a conversion factor. You don't use a formula to
convert pounds to newtons. You use a conversion factor.

There is no inherent physics in a conversion factor.

PD

 




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