General · Media · Photo

Quantum dots – not just for TVs

So, occasionally I run across articles which mention quantum dots; but more frequently I notice this technology promoted in higher quality flat screen displays and TVs. Photo-luminescent nanotechnology. This Phys.org article (below) reminds me that the technology is critical in quantum information processing, e.g., quantum computing. And as Wiki notes, modeling quantum dots showcases the… Continue reading Quantum dots – not just for TVs

Diagram · General · Media

Celebrating 20 Years of Human Presence on the ISS

Lots of media news this week, as the ISS celebrates 20 years [on November 2] of continuous human presence aboard the orbiting laboratory. • Overview of operations [PDF] The ISS is approximately 260 miles above the surface of the Earth, just a bit farther than the distance between Washington, D.C. and New York City. The… Continue reading Celebrating 20 Years of Human Presence on the ISS

General · Media · Story

Yes, Virginia, there is a black hole in the center of our Milky Way

Yes, Virginia, there is a black hole in the center of our Milky Way [1]. What might be expected if you asked, à la a Jay Leno “Jaywalking” segment, some random people this question: “Where’s the nearest black hole?” Well, tallying those that know what a black hole is [5] … those that know what… Continue reading Yes, Virginia, there is a black hole in the center of our Milky Way

General · Language · Media

Connecting everyday experience with quantum effects

NASA’s outreach efforts over the decades have touted the benefits of space science in our (macroscopic) everyday lives. Technology. How about quantum physics? A recent YouTube video by Sabine Hossenfelder (below) is a useful start in answering the question: How does our “big and warm” everyday experience evince quantum effects? (from transcript) … the weird… Continue reading Connecting everyday experience with quantum effects

General · Language

Universal symmetries – what really is broken?

An article from Quanta Magazine (below) recaps the history of space-time symmetries in physics and how those symmetries have, in a sense, been simplified: Galilean (Newtonian) static, separate space and time. Relativistic “flat” space-time – Minkowski / Poincaré / Einstein. de Sitter spherical space-time: “… in the same way that the finite speed of light… Continue reading Universal symmetries – what really is broken?

General · Language

When conservation of energy goes out the window?

This post was inspired by Don Lincoln’s YouTube video “Subatomic Stories: Is the Planck length really the smallest?” In his Q&A (where he responds to questions from prior videos), he notes a caveat about the law of conservation of energy. Energy may not be conserved … because space-time can change. He offers some links for… Continue reading When conservation of energy goes out the window?

Language · Media

Making matter from light – ultra energies and unification of forces

E = mc² The Holy Grail of modern physics is a so-called theory of everything, a unified field theory, a theory which unifies all known “forces.” That is, unifies all the fundamental interactions of nature. The three “quantum” interactions (electromagnetism, weak, strong) and gravitation. A conventional sequence of theories depicts final unification as occurring at… Continue reading Making matter from light – ultra energies and unification of forces

General · Language · Media · Site

Sightseeing near the speed of light – realistic simulation

Paraphrasing: Just a note before you go,A vision to be learnedTraveling near the speed of lightIt’s easy to get … Imagining how things would look when traveling near the speed of light is an interesting exercise. Using a freeware video game developed by MIT Game Lab (2012), this visualization (below) by The Action Lab is… Continue reading Sightseeing near the speed of light – realistic simulation