Category Archives: Physics

Wooster Epicycles

A vector is the sum of its components, a mechanical vibration is a combination of its normal mode motions, a quantum state is a superposition of its eigenstates, and any “nice” function is a Fourier sum of real or complex sinusoids, … Continue reading

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Redefining SI

Today the SI (Système international d’unités) base units are redefined. The following are now exact. Memorize these numbers! Cs-133 transition frequency constant  defines the second. Then light speed constant  defines the meter. Then Planck’s constant  defines the kilogram. Then electron charge constant  defines … Continue reading

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Black Hole Radii

I set the alarm for 8:55 AM. Brutal, but I wanted to watch live the National Science Foundation Event Horizon Telescope news conference. I was expecting the first image of a black hole, and the EHT team did not disappoint. … Continue reading

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March Meeting — Guest Blog by Carlos Owusu-Ansah ’21

I thought the March APS meeting was fantastic. It felt great to present our research findings to people who cared about what Dr. Lindner and I were working on at the College. I attended fun talks about astronomical phenomena and … Continue reading

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March Meeting — Guest Blog by Katie Shideler ’21

Having never been to a physics conference, or even to the city of Boston, attending the annual American Physical Society’s March Meeting was all around a new and incredible experience. Being able to present my research to physicists from across … Continue reading

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March Meeting 2019 Boston

I’m currently in Boston for the 2019 March Meeting, which is as exciting, overwhelming, and exhausting as usual! You may remember last March Meeting, we were in LA, which was naturally nice and warm.  Boston welcomed the March Meeting with … Continue reading

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Relativistic Colors

Metallium, Inc. is attempting to manufacture coins made from as many different metals (and elements) as possible, typically 99 to 99.9% pure. My Metallium coin collection currently includes aluminum, titanium, iron, nickel, copper, zinc, silver, tin, and gold coins. Most … Continue reading

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720° untangles 360° tangles

Despite growing up in three dimensions, as a kid I did not recognize one of 3D’s deep and subtle properties: full rotations tangle, but double rotations untangle! Following physicist Paul Dirac, twist a belt one full turn about its length. … Continue reading

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1+2+3+… = -1/12?

In quantum electrodynamics, the bare charge of an electron is infinite, but the renormalized dressed charge is finite. The bare electron shields itself by polarizing the virtual electron-positron pairs of the nearby quantum vacuum to reduce its coupling at large distances to in natural … Continue reading

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A Better Table

The periodic table of the elements is almost as old as The College of Wooster, and I am a big fan. As we approach next year’s sesquicentennial of Dmitri Mendeleev‘s 1869 periodic table, I present a modest addition to the … Continue reading

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