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→History of E=mc²
The [[liberal]] [[Public Broadcasting Service]] explained the history of '''E=mc²''' for its NOVA series as follows:<ref>http://www.pbs.org/wgbh/nova/physics/ancestors-einstein.html</ref>
The [[liberal]] [[Public Broadcasting Service]] explained the history of '''E=mc²''' for its NOVA series as follows:<ref>http://www.pbs.org/wgbh/nova/physics/ancestors-einstein.html</ref>
{{cquote|Over time, [[physicist]]s became used to multiplying an object's mass by the square of its [[velocity]] (mv<sup>2</sup>) to come up with a useful indicator of its energy. If the velocity of a ball or rock was 100 mph, then they knew that the energy it carried would be proportional to its mass times 100 squared. If the velocity is raised as high as it could go, to 670 million mph, it's almost as if the ultimate energy an object will contain should be revealed when you look at its mass times c squared, or its mc<sup>2</sup>.}}
{{cquote|Over time, [[physicist]]s became used to multiplying an object's mass by the square of its [[velocity]] (mv²) to come up with a useful indicator of its energy. If the velocity of a ball or rock was 100 mph, then they knew that the energy it carried would be proportional to its mass times 100 squared. If the velocity is raised as high as it could go, to 670 million mph, it's almost as if the ultimate energy an object will contain should be revealed when you look at its mass times c squared, or its mc².}}
==Experimental verification==
==Experimental verification==