Book · General

“Star man” as rock star

My meditation on our common sense, everyday experience of physics and the 10^n and 10^-n reality was facilitated by MSNBC this morning — there was a segment with Neil deGrasse Tyson promoting his latest book, Astrophysics for People in a Hurry. A brief Q&A offered some additional context and memorable quotes. For example, Galileo’s famous quote that “The… Continue reading “Star man” as rock star

Book · General · Language

Correspondence principle RIP

In reading Louisa Gilder’s book The Age of Entanglement, I was reminded of Bohr’s correspondence principle1 (originally analogy principle and also referred to as “Bohr’s magic wand”). I hadn’t thought about it much lately. Other than a few times in Lederman’s book Quantum Physics for Poets, the term wasn’t referenced in the other physics books… Continue reading Correspondence principle RIP

Book · General · Media · TV

How to create entangled photon pairs

Have you ever counted the number of things that you own which use lasers?1 One of the best know devices emerging from our understanding of quantum physics is the laser. Remember the meaning of the acronym? Laser pointers are cool, eh. We rely on lasers for communications, entertainment, health & safety, defense, retail services, manufacturing,… Continue reading How to create entangled photon pairs

Book · General · Language · Problem

Sisyphean hierarchy

In the chapter “Beyond this horizon,” Sean Carroll discusses two related problems involving properties of empty space. Before discussing the vacuum energy problem, he profiles the so-called hierarchy problem in the cosmic energy scale. It’s about the effects of virtual particles. The energy scale that characterizes the weak interactions (the Higgs field value, 246 GeV)… Continue reading Sisyphean hierarchy

Book · General · Language

Symmetry → connection field → force of nature

Here’s my take on gauge symmetry after reading about the concept (some references are listed below). There are mathematical frameworks for space, and in physics there are equations of motion for space. A mathematical framework deals with geometric and numeric objects. In everyday life we basically equate these objects in a Euclidean space using the… Continue reading Symmetry → connection field → force of nature