# Interpretation of Special Relativity

When we looked at Quantum Mechanics, we talked about its various interpretations. The reason we have such interpretations, Je l'ai dit, is that QM deals with a reality that we have no access to, through our sensory and perceptual apparatuses. D'autre part, Special Relativity is about macro objects in motion, and we have no problem imagining such things. So why would we need to have an interpretation? The answer is a subtle one.
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# Speed of Light

The speed of light being a constant sounds like a simple statement. But there is more to it, quite a bit more. Let’s look at what this constancy really means. À première vue, it says that if you are standing somewhere, and there is a ray of light going from your right to left, it has a speed c. And another ray of light going from left to right also has a speed c. So far, so good. Now let’s say you are in a rocket ship, comme représenté sur la figure ci-dessous, moving from right to left.

# Théorie de la relativité restreinte

Quand nous entendons parler d'Einstein et de la relativité restreinte (ou la théorie de la relativité, d'utiliser le nom réel), nous pensons à la célèbre $E = mc^2$ équation, et des choses bizarres comme le paradoxe des jumeaux. Bien que ces choses sont vraies et importantes, le problème SR tente de résoudre est un complètement différent. Il est une tentative de défendre un principe de base en physique.
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