Tag: Albert Einstein

Stop the Presses.  Gravity is a Force and Space is not Curved.

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So I get most of my physics from YouTube and the latest news flash is that Einstein’s belief that mass warps space-time may be put aside for a theory where gravity is a force again and space-time isn’t curved.  In fact, maybe it’s not space-time anymore just space and time.

Uh, okay.  Personally, I never understood why (or how) space could be curved.  I didn’t see why light couldn’t just be affected by gravity the same as everything else.  I mean what does it mean to say space is curved?  Space, per se, is nothing.  It is the lack of something and all it has is location so how can a bit of nothing be curved?  Now the fact that matter and even light can be deflected in their motion through space makes sense.  We can see it all the time with magnets and projectiles in a gravity field.  It’s Newton’s law extended by all the other theories that identify the other forces; electromagnetic, weak and strong nuclear forces.  So why say space is curved?  According to the report (and I’m not saying I can fathom this) this new way of looking at gravity also eliminates the current paradox between quantum theory and Einstein’s conception of gravity.  In your face Albert!

Now to be fair to Professor Einstein later on he had been thinking about a similar system he called Teleparallel Gravity.  So maybe all of this is just more reviewing old ideas because nothing new has been discovered.  But I think it makes sense to bring the best minds to bear on these fundamental questions.  Of course, if there’s no space-time then all of the science fiction that used the term becomes dated and passe.  Such is life.

Now, if there is no warping of space does that mean Black Holes can’t tear a hole in it?  Is there no such thing as a singularity?  Are there no worm holes and no way to go from one universe to another?  Next thing you know they’ll be telling me that the speed of light isn’t the fastest speed possible and faster-than-light travel is perfectly achievable if only I can buy enough dynamite from the ACME company and strap it to the back of my rocket sled.

Okay, now the inertialess drives of Doc Smith’s Skylark and Lensman series are science again and jungle worlds with naked red-haired amazon warrior women who can become part of the federation are totally realistic again.  I just hope that the ultra-intelligent but hopelessly-evil amoeboid Eddorians don’t find out about this quantum gravity thing before the Arisians do, so we will still have a chance to perfect a way to destroy Ploor with an inertialess planet that we’ve somehow translated from another dimension and then restored its inertia in time to use it as an irresistible planet wrecker.  Oh wait, I just said there are no alternate dimensions.

Okay, forget that last bit.  But otherwise, I’m completely on board with this new quantum gravity/non-curved space rigamarole.  Let’s just try and give it a cooler name.

Where’s My Slide Rule?

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Thank you, Donald Trump.  Watching your show on Monday and Tuesday was like a canteen of cold clean water to a man dying of thirst in the desert.  I feel I’ve been paid back for any trouble I’ve taken on your behalf in the last four years.  Hallelujah and amen.

Okay now it’s up to Trump and his merry band of madmen to fix Washington and fix the country and do that list of a million impossible things that he said he’s going to do.  Have at it, boys.  Give ‘em hell.

So, what’s for me to talk about tonight?  Well, I’ve got to talk about what’s chasing around my head tonight.  First off, I’m grumbling about how damn cold it is today.  The heating system at the Compound is undersized.  Or maybe the insulation should be the focus.  When the outside temperature dips below zero Fahrenheit, it won’t hold a set point above seventy.  And that’s too bad because I hate being cold inside my own home.  Camera Girl holds me directly responsible because I never put the weatherstripping around two of the external doors.  I explained to her that these small insulation problems are only a minor part of the problem and that I’m addressing the problem holistically by spending considerable time thinking deeply about all the ways that a solution can be reached.  I’ve considered the thermodynamic aspects of the problem.  The psychological ramifications of the fear of cold.  The physiological mechanisms by which the human body adapts to hypothermia.  The cultural involvement of cold in the human industries that are called clothing and shelter.  The quantum meaning of absolute zero.  And finally, the latest bill from the heating oil company.  All these things I showed her and admonished her to have patience and faith in my stewardship of the Compound’s Overall Heat Transfer Coefficient (U).  None of this registered with her at all.  She made certain primitive Sicilian gestures with her face and hand that I won’t dignify with detail.  Suffice it to say they were not helpful in the least.  I’m going out tomorrow for other reasons.  But I may also pick up some weatherstripping.  Maybe.

I was recently in a discussion about General Relativity with a friend.  The question of the curvature of space came up.  I told him I’ve never been convinced of the idea that mass curves space-time.  I stated that what is the difference if gravity bends the path of light and matter when it comes close to an object like the sun but space is unaffected?  How would we know the difference?  After all, how the hell can you bend something that isn’t even there?  It’s empty space.  Now sure, particles are always popping into existence because of quantum effects.  But by definition those things aren’t empty space they’re matter.  So how the hell can something that’s nothing bend?  Anyway, after the argument got us nowhere, I got hold of a book on general relativity and started reading it.  But my mathematical skills have degraded so I’ve had to break out a book on vector analysis to try and remember what tensor notation means.  Oh, my aching head.  I had an old advanced calculus test from my undergraduate days that would be very helpful on some points but then I remembered I threw it out (stupidly) about thirteen years ago when I moved.  I was going to buy it used and was amazed how expensive text books have gotten.  Yikes!

So anyway, I’m ensconced with the Kronecker delta, the curl and the Laplacian.  And I think I’ve made a big mistake.  I predict by the end I’ll have nothing but a murky idea of the meaning of the proofs of relativity but no explanation as to why we would think of space as being curved.  I think the idea that space is curved is just a figure of speech.  The reality is “space’ goes on endlessly in every direction.  I don’t think it loops back around behind us or anything like that.  It just keeps going.  It’s the same as physicists saying that the beginning of the universe was the Big Bang.  Well, what about five seconds before that?

So here I am with my cave man cosmogeny and cosmology trying to relearn Einstein’s equations (at my age!).  Well, why not?  Trump’s fixing the country.  The least I can do is straighten out the theoretical physicists.  Camera Girl! Where’s my slide rule?

01MAY2020 – Quote of the Day

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I am not an Atheist. I do not know if I can define myself as a Pantheist. The problem involved is too vast for our limited minds. May I not reply with a parable? The human mind, no matter how highly trained, cannot grasp the universe. We are in the position of a little child, entering a huge library whose walls are covered to the ceiling with books in many different tongues. The child knows that someone must have written those books. It does not know who or how. It does not understand the languages in which they are written. The child notes a definite plan in the arrangement of the books, a mysterious order, which it does not comprehend, but only dimly suspects. That, it seems to me, is the attitude of the human mind, even the greatest and most cultured, toward God.

Albert Einstein