Mathematics Physics UD's Sci-Tech watch

The reality of “imaginary” numbers — discovery, not invention

Over at YouTube, there is a bit of history of Math, on study of cubic functions — and yes there is as usual, some less than exemplary detail — that led to the “invention” of imaginary numbers: Now of course, I contend that this was discovery not invention (I often don’t buy Veritas Sum’s narrative, Read More…

Cosmology Logic and First Principles of right reason Physics

At Mind Matters News: How can the universe have arisen from nothing?

Louise runs through a number of ideas that sound popular in the lunchroom but don’t stand the test of careful thought. Just for example, “one day science will answer the question of why the universe exists.” But that’s not what science does. Generally speaking, science answers “how” questions, not “why” questions.

Cosmology Intelligent Design Physics

FYI: In quantum mechanics, time may flow differently

At Eurekalert: As pointed out by Giulia Rubino, lead-author of the publication, “although time is often treated as a continuously increasing parameter, our study shows that the laws governing its flow in quantum mechanical contexts are much more complex. This may suggest that we need to rethink the way we represent this quantity in all those contexts where quantum laws play a crucial role.”

Cosmology Intelligent Design Physics

Sabine Hossenfelder explains why antimatter doesn’t fall up

Hossenfelder: Inside a neutron and proton there aren’t just three quarks. There’s really a soup of particles that holds the quarks together, and some of the particles in the soup are anti-particles. Why don’t those anti-particles annihilate? They do. They are created and annihilate all the time. We therefore call them “virtual particles.” But they still make a substantial contribution to the gravitational mass of neutrons and protons.

Cosmology Intelligent Design Physics

Rob Sheldon on lowering the standard for detecting gravitational waves

Sheldon: “So to summarize, the absence of triple coincidences is being withheld from the paper, when in fact, it delegitimizes the entire data analysis pipeline. Now we have 4 Gravity wave detectors, and soon one in space. At what point does the lack of a triple coincidence become fatal? What observation can they make that would disprove the existence of gravity waves?”

Note: In media work, we say: It takes three to make a trend.