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Den 04.03.2025 18:24, skrev rhertz:Poor Planvk: His quantum of action "hf" ia used by imbecile relativistsOn Tue, 4 Mar 2025 13:35:41 +0000, Paul.B.Andersen wrote:>
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<snip>The famous pion decay into two photons prove that mass can
indeed be converted to energy (kinetic energy of mass-less particles).
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In SI units the equation in the rest frame of the pion becomes:
mc² = 2 h/f
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where m is the mass of the pion in kg, c is the speed of light in m/s
h = 6.62607015e–34 kg⋅m²/s, f = the frequency 1/c
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SI definition of 1 kg = (h/6.62607015e–34) s/m²
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So we have kg⋅m²/s² on both sides
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If it is true that mass can be converted energy,
Which is experimentally confirmed.
>>then the Equation E = mc² is true by definition!
See Jan's post.
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But c² is only a proportionality coefficient necessary
to balance the units in the SI system.
>>>
It's a no-brainer to believe in the conversion of mass into energy.
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In the last couple of millenniums, or even longer than that, and even
before the CONSENSUS that heat was a kind of energy (early XIX century),
thousands/millions of inquisitive minds wondered HOW COME wood in a fire
CONSUMED to ashes, with most of its volume disappearing, while heat
(radiant, by convection or conduction) was generated. The first
water-based engine/toy was invented about 2,000 years ago.
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The heated water disappeared (mass), converting the opposite flows into
mechanical work (energy). Ancient Romans enjoyed this gadget, and I'm
sure that many tried to find a practical use of this effect.
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https://www.reddit.com/r/todayilearned/comments/oqn2f/
til_the_ancient_romans_had_steam_engines_the/
Why are you diverting the attention from the issue
by telling us that the romans believed the mass of
the water disappeared when it was heated?
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What I've been questioned here, for years, is that E=mc^2 is A FUCKING
CONVENTION, and that Einstein committed FRAUD in his FUCKING 1905 paper,
using circular reasoning. After a few years, seal physicists applauded
this simple equation (NOT PROVEN ONCE THEORETICALLY), and hyped the
image of Einstein as the genius of geniuses.
Of course you can't prove theoretically that mass can
be converted to energy and vice versa.
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You can however prove that it follows from
some assumptions.
Einstein's derivation is a thought experiment,
so of course it is circular.
He says: If we assume the postulates of SR and Maxwell's
theory are correct, then it follows that E = ∝ m.
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Now we know that his conclusion was correct, even
if his derivation may be questioned.
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Because now it is proved experimentally!
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When a pion decays, the mass of the pion disappear completely.
The photons are massless 'pure' kinetic energy.
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Do you dispute this?
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This is what the equation E = mc² expresses.
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But yes, the form of the equation is a convention since
the choice of units is a convention.
With different choice of units the equation may be different.
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Like E = m
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But it expresses the same: energy can be converted to mass
and vice versa.
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And that is not a convention, it is a fact.
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