General · Language · Site

Age of universe — implications?

Imagine a survey where you ask “How old is the universe?” as a multiple choice question: 1,000’s of years 100,000’s of years Millions of years Billions of years Other _______________ What would you expect as a result? Quite a mix? Well, among scientists this question is essentially settled, as indicated in some Space.com articles. “How… Continue reading Age of universe — implications?

General · Language · TV

Solar eclipse and relativity — there is no Vulcan

This Space.com article “Solar Eclipse Science Helps Prove Einstein’s Relativity Theory in Nat Geo’s ‘Genius’” published on May 30, 2017, reminded me of the connection between the study of solar eclipses and Einstein’s theory of general relativity. While the U.S. prepares for the Great American Total Solar Eclipse coming on Aug. 21, National Geographic’s “Genius” recounts… Continue reading Solar eclipse and relativity — there is no Vulcan

General · Language · Site

Is reality digital or analog?

While studying physics this past year, I noticed tension between theoretical and experimental physicists, especially between younger quantum field theoreticians and veteran particle physicists — regarding deep reality and the various formulations of quantum mechanics (addressed in another post). Revisiting some archived debates, this philosophical question (“Is reality digital or analog?”) was posed in an essay… Continue reading Is reality digital or analog?

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 · 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