Quiddities and quandries from my quintessential quest

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About Physicists

Physicists spend a large part of their lives in a state of confusion. It’s an occupational hazard. To excel in physics is to embrace doubt while walking the winding road to clarity. The tantalizing discomfort of perplexity is what inspires otherwise ordinary men and women to extraordinary feats of ingenuity and creativity; nothing quite focuses [...]

Relativity and its non-paradoxes

The Clock Paradox illustrates how relativity theory does indeed contain inconsistencies that make it scientifically problematic. So says Dr Peter Hayes, a senior lecturer in politics (yes, politics), as quoted in an article at Science Centric entitled “Has Einstein failed physics?” I am getting really sick and tired of people trying to bring down Einstein. [...]

Answering Questions as a Teaching Assistant

The following questions and answers are from a course called Physics and Society, offered at the University of Windsor. I am the teaching assistant for the course, and as such I answer the students’ questions on a private online discussion board. The current unit covers the basics of electromagnetism and relativity, and I have included [...]

Boldly trying to explain spacetime

There seems to be some confusion [among the students in my Physics and Society class] about spacetime, which is completely understandable because it’s difficult to visualize. I’m going to review some of the main ideas of it here, hopefully clearing up some confusion along the way. The main quote many people gave in their summaries [...]

Relativity and Time Dilation

The fact that time isn’t consistent for everyone is a very troubling idea, and even physicists have a hard time learning about it initially. Imagine how difficult it was for Einstein to convince his peers about it originally! He didn’t even have the benefit of science fiction to lean upon for sparking the imagination! In [...]

Fun with Doppler Shift

IF THIS STICKER IS BLUE, YOU’RE DRIVING TOO FAST! – CafePress Bumper Sticker. A snarky physicsy bumper sticker… what’s not to love? :)

Electron Spin Visualization

Air on the Dirac Strings, by EVL: Electronic Visualization Laboratory, and posted by evltube on YouTube. Electron spin is definitely a weird property, especially because of the fact that it requires two full rotations to return to its original orientation, instead of just one. This video has some excellent visualizations to help wrap your head [...]

Relativistic World Line Animation

I’m totally in awe of this image every time I come back to the Wikipedia article on Special Relativity. This animation shows how events in spacetime (the background dots) at various distances (horizontal axis) appear at various times (vertical axis, ticking by at a constant rate) to the observer (whose trajectory in spacetime is passing [...]