Drakkith said:
Then please provide some reference stating that energy and mass are the same thing. And not only that, but justifies it too.
The equation e=mc^2 justifies it .
Einstein's most famous equation is E=mc^2. It means that energy and mass are different forms of the same thing.
http://simple.wikipedia.org/wiki/Albert_Einstein
Another reason :
Matter and Antimatter annihilation is an example of converting energy in one form (electrons and positrons) into another (high-energy photons) .
Or A photon it's a packet of energy can pair-produce to make an electron and a positron too .
The mass-energy equivalence equation is NOT a definition of either mass or energy. It is a mathematical way of relating the amount of mass associated with an amount of energy, and the amount of energy associated with an amount of mass
No we can say it's a definition
The language of physics is mathematics Think of what Work is . Work is when a force causes displacement of a body . we can translate this definition to mathematics with the equation w=fd
Also, the equation is missing the rest of it anyways. The full version includes momentum as well. It is E2 = m2c4+p2c2.
What does this about momentum now? Is it too also energy? No. It is not.
No we can say momentum and energy are same thing too , think about photons
Photons are packets of energy
Your equation is
E
2 = m
2c
4+p
2c
2.
For a photon the rest mass term vanishes, and you get E=pc.
So energy and Momentum are related by a constant ( related by the invariant speed of light).
See the Pythagorean relationship between Energy (E), Mass (m) and Momentum (p) .
You are correct in that knowing either the frequency of the EM wave or the energy of the photon you can find the other, but this in no way means energy and frequency are the same things.
No they are same thing because frequency of photon can do work . if frequency be higher photon can do work more .
Vanadium 50 said:
That's simply not correct. If I have a 100Ω resistor, and measure its current and the volatge across it, they are related by a constant, but current and voltage are not the same thing.
No that's not true . in equation RI=V resistor is not a constant voltage and current can be a constant too ,
for example : I have a 100 amperes , and measure its resistor and the voltage across it
Is that mean R and V are same thing ? no .
But in equation e=mc^2 we just have a constant and it's speed of light .
Hope you understand .