Publish at November 15 2023 Updated November 15 2023
E=mc2. We've all seen this equation once in our lives; it's associated with Albert Einstein, physicist and figure of genius of the 20th century. But unless we're interested in physics, do we really know what it means? It's linked to special relativity, but that doesn't really mean anything. A YouTube clip attempts to explain the principle to neophytes and physicists alike.
What Einstein discovered was the idea of the space-time continuum; that each observer experiences the sequence of events differently. To go from one to the other, we need to perform an equation called the Lorentz transformation. So, let's imagine that we jump from one point of view to the other. We need to know the amount of energy lost or gained to reach it, and calculate the velocity to join the two coordinates.
For a physicist, the classical equation is more interesting in another way: m = E/c2. In this way, mass - i.e. the physical property explaining resistance to applied forces - would be caused by the system's energy. To clarify the principle, a box with a few photons would be easier to move than one with many more.
Running time: 18min31
Photo : VectorMine / DepositPhotos
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