Archivo de la categoría: Topical

Incluye mensajes sobre física, filosofía, ciencias, finanzas cuantitativas, economía, medio ambiente, etc.

Si su hijo es tan grande como usted,en

My mom used to say that when your child is as big as you, you have to treat them with respect. What she actually said was that you had to address them using a respectful form of “usted,” which doesn’t make any sense in English, but may work in Hindi or French. It worked poetically well in Malayalam. I was reminded of this maternal pearl of wisdom recently when I was watching a movie with my son.

I am attending a research retreat on mindfulness and contemplative practices at the beautiful Garrison Institute. I am learning a lot of interesting things, and meeting a lot of like-minded and excellent people – the kind of people with whom I could have deep conversation about the unreal nature of reality, unlike most people from other walks of life would politely and tactfully excuse themselves when I get a bit unreal.

Twilight Years

At some point in our life, we come to accept the fact we are closer to death than life. What lies ahead is definitely less significant than what is left behind. These are the twilight years, and I have come to accept them. With darkness descending over the horizons, and the long shadows of misspent years and evaded human conditions slithering all around me, I peer into the void, into an eternity of silence and dreamlessness. Es almost time.

Resumen de la Física Moderna

Desde la línea de postes de Partículas e Interacciones se convirtió en un poco más de lo que quería, Pensé que iba a romperla. Vamos a empezar con un resumen de la física moderna que tendrá que entender la estructura de la materia.

Interpretation of Special Relativity

When we looked at Quantum Mechanics, we talked about its various interpretations. The reason we have such interpretations, I said, is that QM deals with a reality that we have no access to, through our sensory and perceptual apparatuses. Por otra parte, 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. A primera vista, 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, como se muestra en la siguiente figura, moving from right to left.

Cuando oímos hablar de Einstein y la relatividad especial (o la teoría especial de la relatividad, utilizar el nombre real), pensamos en la famosa $E = mc^2$ ecuación, y las cosas extrañas como la paradoja de los gemelos. Mientras que esas cosas son ciertas e importantes, el problema SR trata de resolver es un ser completamente diferente. Es un intento de defender un principio básico de la física.