Radiation paradoxes 2: Space and inertial frames

In trying to understand and resolve the paradox I wrote about in the first post in this series, I will be taking a somewhat circuitous route in order to lay some important groundwork before we can directly confront the paradox.

We can start the journey by looking at one of the most fundamental concepts in physics, that of the nature of space. On the surface, space seems like a very straightforward concept. It is seen as a kind of container in which everything in the universe exists. But difficulties arise when one asks questions such as whether space can be viewed as something positive, a tangible entity that has its own properties that can be detected, or whether it is viewed as something negative, that signifies the absence of matter in a region. Another way of posing the distinction is asking whether, if one can conceive of removing all the matter and energy in the universe, what would we be left with? Just ’empty space’? In the absence of matter, would such a thing have any meaning at all?
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Wellness and woo

The concept of ‘wellness’ has been gaining ground in the US. It is a vague term and, as I understand it, it means taking proactive steps to maintain one’s health, such as eating healthily, getting exercise, avoiding harmful practices like smoking, getting enough rest, and so forth. The idea is that by doing so, one can stave off some of the ailments and illnesses that can affect one’s wellbeing.

An additional layer is laid on in the name of holistic’ approaches to health, with the idea that the mind and body are connected and that one should also try and maintain a healthy mindset. These could include practices like yoga, meditation, relaxation techniques, and other activities that seek to reduce stress, blood pressure, and the like.

All that is perfectly reasonable.
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Escalating cult behavior

I have written before that many of the followers of Donald Trump seem to resemble members of cults. While these cult members seem to be easily persuaded to believe the most bizarre things and even to commit reckless and pointless acts of defiance such as invading and vandalizing the Capitol building on January 6th, they do not seem (at least so far) to exhibit the more extreme forms of cult behavior, such as being willing to take actions on the command of their leader that could lead to their own deaths. One the most extreme examples of such cult behavior was the Jonestown massacre in Guyana where in 1978 over 900 people died, many of them because they took cyanide poison on the command of their leader Jim Jones, that he ordered after his guards killed a visiting US congressman and four of his entourage.
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Radiation paradoxes 1: Do electric charges and neutral particles fall at the same rate?

I have recently fallen down a rabbit hole in physics trying to resolve some paradoxes that I stumbled upon. In spending a lot of time and mental effort trying to understand what is going on, I realized that although I have spent my life studying and teaching physics, I did not fully understand some very fundamental aspects of space and motion and the way that the laws of physics operate. That is part of the fascination that physics provides, that it can always surprise you, leading you to learn new things.

In an occasional series of posts, I will share with readers my journey through this maze, trying to make things as clear as possible to the non-physicists out there. This will not be easy because an important prerequisite to explaining something to someone else is for you to understand it first. I cannot claim to understand completely what I am going to be writing about, for which I apologize in advance. But it is well known among teachers that it is in trying to explain something to someone else that one starts more deeply understanding what one is trying to say. Like many teachers I have used students as sounding boards for tentative ideas.
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Cable news is the tail that wags the political news dog

I do not watch TV. That statement requires some explication these days when there are so many ways in which one is surrounded by mass media. What I mean is that I live in too remote an area to receive any over-the-air broadcast network TV channels and I do not subscribe to any cable TV system that gives me access to those channels or to cable channels. I do have a TV that I use to watch streaming videos from various sources, some of which include TV shows that have been broadcast previously on network TV.

So what I mean by saying I do not watch TV is that I do not watch any of the nightly news programs on network TV or the 24/7 cable news channels like CNN, MSNBC, and Fox News. And yet, in my surfing of the web, I find myself bombarded by stories that have their origins in cable news. These channels seem to be less about unearthing and reporting actual news and more about generating news about themselves. My impression is not misguided. Jack Shafer says that these cable news networks have a very small audience and yet have an outlandishly disproportionate effect on public discourse and that it is time to cut the cord.
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The flawed US parole system

There is so much that is wrong with the US (in)justice system that one does not know where to start with trying to reform it. From overly-aggressive police departments, over-zealous prosecutors more interested in gaining convictions than justice, and a legal system where one needs good lawyers to get even a shot at justice but many people simply do not have access to them and the public defenders offices, while often endeavoring mightily on behalf of their indigent clients, simply are overwhelmed. And all that is soaked in a deep-rooted racist mentality. Changing all those things requires money and political will to go against the punitive mindset that seems to prevail

But if one were to start with something significant but feasible, it might be with the parole system that in theory enables prisoners to obtain release before completing their sentence provided they have given evidence of good behavior and the promise of not returning to crime. There is one aspect of it, however, that is a problem and that is the requirement that one must admit guilt for the crime before one is eligible for parole at all. This puts those who have been wrongfully convicted because of all the problems listed in the first paragraph, in a bind. If they admit to a crime that they did not do, they may get an early release. But they are forever barred from trying to establish their innocence and also they and their families have to live with the stigma of having committed a crime.
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Don’t they carefully vet the White House physician?

The White House physician is an important job, since he is supposed to supervise the health of the US president. So it is surprising that Ronny Jackson, who held that post under both Barack Obama and Donald Trump, is a proponent of wild conspiracies, the most recent of which concerns the Omicron variant.

Roughly 24 hours after most people in America first heard about the Omicron variant of Covid-19, Texas Rep. Ronny Jackson (R) offered a conspiracy theory to explain what was happening.

“Here comes the MEV – the Midterm Election Variant,” tweeted Jackson, who, not for nothing, is also a physician. “They NEED a reason to push unsolicited nationwide mail-in ballots. Democrats will do anything to CHEAT during an election – but we’re not going to let them!”

And then there was this from Fox News personality Pete Hegseth: “Count on a variant about every October, every two years.”

The idea here is clear: The emergence of Omicron is a political gambit by Democrats designed to aid them at the ballot box.

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The strange case of the Michigan school shooter

In many ways, the tragedy of the high school student who shot and killed four students and injured seven others follows a pattern we have become drearily familiar with in this gun-soaked and violent country.

What makes this different is the strange role played by the parents. Usually parents express shock and disbelief at what their child did and try to find reasons that might at least partly exculpate them. But in this case, the parents seem to have played a different role, almost as if they were aiding him. Apparently they had purchased the gun just four days before and seemed to have left it in a location that was easily accessible to their 15-year old son. Furthermore, there had been warning signs on the very day of the shooting that the boy was disturbed and had violent fantasies.
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The bear and the atheist

At my bridge club, on one of the days of the week, there is a tradition of someone, who is I think the oldest person in the group, starting the session with a joke before we start playing. Her jokes are usually raunchy and pretty funny, and she tells them well. But on days when she is absent, someone else will tell a joke and this week the person told one about an atheist and a bear. It is an old joke, the kind that gets circulated that you can read here. I had heard this same joke about ten years earlier and wrote about it then.

It struck me this time that although the atheist is supposed to be the butt of the joke whom we are supposed to laugh at, Christianity comes off worse, with their God being portrayed as vengeful and vindictive with a cruel sense of humor, hardly the loving and forgiving deity that is advertised nowadays. The atheist, on the other hand, comes across as a reasonable, honest, and principled person, not pretending to have a religious conversion even as he faces death. I wonder if the Christians who like to relate this joke realize this.

I was also amused because I do not think that the people in my bridge club (other than my bridge partner) know that I am an atheist. In general, I do not make a point of talking about my beliefs unless it comes up naturally in conversation. I know and like the woman who told the joke. I wonder if she would have made the joke if she knew about my lack of belief in gods.