On Unlimited Growth

Many of you follow my eclectic blog posts hoping that one of them might appeal to you.  They span a broad range from personal to professional, craft to art, simplistic to technical, worldly to cosmic.  I sometimes offer my opinions and back them up with data.  In today’s data-challenged world (not from a dearth of data, but rather the challenges from those who don’t like the data), it is hard to make a compelling argument.

Nevertheless, I recently embarked on exploring a topic that has always bothered me:  the idea that we can solve our problems by economic growth.  I can see how it can solve certain short term problems, like borrowing money to pay back interest on prior loans, but it didn’t seem like a viable long term strategy.  We live on a finite planet and so eventually we would end up against practical physical limitations, right?

It is obvious to a physicist, but seemingly not to many others.

Over the last month, while staying warm in our natural gas-heated home, I looked into the future of fossil fuels and their impact on our global economy.  I crafted three essays which are more technical than many of my posts, and may not be of interest to many of my followers.  So don’t feel compelled to digest them.  

But if you are curious, here are brief descriptions, with links.

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Cloud Chamber Update

I still don’t have a reliable setup, but some recent changes I made to my cloud chamber have resulted in this very satisfying display of subatomic contrails.  Here are a couple of recordings.  The first documents when I was stunned to see multiple concurrent trails and I called for Poldi to witness it.

“Hey Poldi!” (expand to see what we were excited about).

The second video is a sustained view for several minutes, placed to background music, to mesmerize those of us who are susceptible. Think about it. This is a visual representation of the radiation that is all around us! Expand to full screen for best effect.

If you’d like to read about how I got here, the previous post describes the project of building the cloud chamber.


Cloud Chambers and Balloons

A view looking directly down in my cloud chamber showing a fragment of uranium glass.  A small white streak pointing to 11:00 appears above it, which is a track of some subatomic particle, possibly an alpha particle from a radioactive decay within the glass. (Click to enlarge).

Years ago, after watching some YouTube videos on making cloud chambers, I tried my hand.  A cloud chamber is one of the earliest techniques to see the paths of subatomic particles.  It turns out that there is a natural background radiation of them and I wanted to see if I could watch these particles as they whizz around us.  It seemed like a cool experiment.

The analogy I like to use is of a high altitude jet leaving a condensation trail behind it.  You can see the contrail, but not the jet making it.  In a cloud chamber, similar condensation physics is at work, but instead of engine exhaust, it is the particle’s ionization of gas molecules that triggers the condensation.  The original Wilson cloud chambers used water vapor; modern chambers use alcohol, which is more easily managed.

My attempt to make one was less than satisfying.  I recall staring at the mist at the bottom of the container and imagining that I was seeing patterns of droplets. Maybe I did, but it was not the thrilling experience of seeing the invisible that I was hoping for.  I put the project aside.  Until recently.

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