OT - Happy Birthday Albert Michelson

Nitwit

Well-known member
Oct 12, 2021
1,481
2,224
113
December 19, 1852:
Birthday of Albert Michelson the first American to win a Nobel prize for Physics (1907), awarded for his experiment that determined the speed of light, made on an interferometer which he developed and is still used today for measuring the wavelengths of spectrums.
1703001589499.png
 
Last edited:

psuro

Well-known member
Oct 12, 2021
8,003
17,427
113
I Forgot Kristen Bell GIF by Team Coco
 
  • Like
Reactions: BobPSU92

BobPSU92

Well-known member
Oct 12, 2021
17,609
26,615
113
December 19, 1852:
Birthday of Albert Michelson the first American to win a Nobel prize for Physics (1907), awarded for his experiment that determined the speed of light, made on an interferometer which he developed and is still used today for measuring the wavelengths of spectrums.

Plus he was a proponent of the fullback.
 

LionJim

Well-known member
Oct 12, 2021
11,005
15,088
113
December 19, 1852:
Birthday of Albert Michelson the first American to win a Nobel prize for Physics (1907), awarded for his experiment that determined the speed of light, made on an interferometer which he developed and is still used today for measuring the wavelengths of spectrums.
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )
 
Oct 12, 2021
1,862
3,161
113
Stop making stuff up.
I was once really acquainted with the whole relativity thing. The brain is old and feeble now, so I do just make $H!+ up. Just ask my wife and daughter. My wife really busted me on something the other day. We were both howling at a mistake I made about a CD that we bought when we were first married. I'm laughing about it now. I am the official idiot in the family. :)
 

BobPSU92

Well-known member
Oct 12, 2021
17,609
26,615
113
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )

 

Woodpecker

Well-known member
Oct 7, 2021
3,441
6,602
113
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )
Thus leading to one of the great mysteries of science: why is Nolan Ryan throwing fastballs on a train?
 

Bkmtnittany1

Well-known member
Oct 26, 2021
4,526
7,040
113
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )
Kramer’s got the caboose!
 

HarrisburgDave

Well-known member
Oct 29, 2021
934
1,351
93
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )
The Richard Feynman lectures on You Tube are fantastic. When Feynman reviews this even an old 2.8 GPA like me can understand this.

BTW, when are they going to do a movie about Feynman? Oppenheimer was a dopey lefty with a lack of common sense. Feynman was a true genius, a man of uncanny humor and perception, and he had a backstory that was incredible. From the Manhattan Project, to a Nobel Prize, to the Challenger investigation. He traveled through the 20th Century living a full life and was an inspiration to generations of young people.
 
Last edited:

LionJim

Well-known member
Oct 12, 2021
11,005
15,088
113
The Richard Feynman lectures on You Tube are fantastic. When Feynman reviews this even an old 2.8 GPA like me can understand this.

BTW, when are they going to do a movie about Feynman? Oppenheimer was a dopey lefty with a lack of common sense. Feynman was a true genius, a man of uncanny humor and perception, and he had a backstory that was incredible. From the Manhattan Project, to a Nobel Prize, to the Challenger investigation. He traveled through the 20th Century living a full life and was an inspiration to generations of young people.
 

Hugh Laurie

Well-known member
Oct 6, 2021
391
549
93
December 19, 1852:
Birthday of Albert Michelson the first American to win a Nobel prize for Physics (1907), awarded for his experiment that determined the speed of light, made on an interferometer which he developed and is still used today for measuring the wavelengths of spectrums.
View attachment 482738

Happy birthday Al.

Caveat: Al's measurement was that of the two way speed of light, (ie) a send and return measurement . The one way speed can never be measured because there is no way to define the one way speed of light, The two way speed is based on Einstein's synchronization convention that states the speed is the same in opposite directions and that it is neither a supposition nor an hypothesis about the physical nature of light, but a stipulation one makes of ones free will to arrive at a definition of simultaneity
 

LionJim

Well-known member
Oct 12, 2021
11,005
15,088
113
Cool. I will have to watch this.
You’re probably familiar with James Gleick’s biography of Feynman, Genius? If not, do yourself a favor and order it. Just a great book. The description of Feynman’s relationship with Freeman Dyson is worth the price of the book.

It is my fanboy opinion that Feynman was the greatest mathematician among those who chose physics over mathematics. (Heisenberg was another, Lord Kelvin too.) Feynman won the Putnam competition, a nationwide mathematics competition for undergraduate students in which the annual median score is usually zero.
 

LionJim

Well-known member
Oct 12, 2021
11,005
15,088
113
Happy birthday Al.

Caveat: Al's measurement was that of the two way speed of light, (ie) a send and return measurement . The one way speed can never be measured because there is no way to define the one way speed of light, The two way speed is based on Einstein's synchronization convention that states the speed is the same in opposite directions and that it is neither a supposition nor an hypothesis about the physical nature of light, but a stipulation one makes of ones free will to arrive at a definition of simultaneity
Thank you. I wasn’t quite up to speed on that. I knew I was waving my arms a little bit in my post but close enough.
 

HarrisburgDave

Well-known member
Oct 29, 2021
934
1,351
93
You’re probably familiar with James Gleick’s biography of Feynman, Genius? If not, do yourself a favor and order it. Just a great book. The description of Feynman’s relationship with Freeman Dyson is worth the price of the book.

It is my fanboy opinion that Feynman was the greatest mathematician among those who chose physics over mathematics. (Heisenberg was another, Lord Kelvin too.) Feynman won the Putnam competition, a nationwide mathematics competition for undergraduate students in which the annual median score is usually zero.
I know that Feynman is often criticized today with challenges to his work. He was not perfect, but he was admirable in so many ways. That New York accent and sense of humor in his lectures makes them a must watch. There is a five hour long series on YouTube where he lectures on fundamental physics and the development of the basic laws that govern physics. Anyone with an adolescent child showing an interest in the subject should have them watch Feynman. He made the world more interesting.
 
  • Like
Reactions: LionJim

PSU Mike

Well-known member
Oct 6, 2021
2,383
3,926
113
Yes, a hugely influential scientist. The Michelson-Morley experiment (performed in Cleveland, just saying) proved that the speed of light is constant relative to every possible frame of reference. (If Nolan Ryan can throw a baseball at 100 mph, then if he is standing in a train traveling in a straight line at 100 mph and throws the ball in the direction the train is traveling, the ball will be going 200 mph as measured by someone standing immediately outside the train at the instant Ryan throws the ball. If Ryan throws the ball towards the caboose, the ball will be traveling at 0 mph relative to the observer outside the train. Of course, the ball will be traveling at 100 mph relative to Ryan himself. The speed of light is constant relative to every possible observer )
Yeah, but southern light is still faster than northern light.
 

LionJim

Well-known member
Oct 12, 2021
11,005
15,088
113
I know that Feynman is often criticized today with challenges to his work. He was not perfect, but he was admirable in so many ways. That New York accent and sense of humor in his lectures makes them a must watch. There is a five hour long series on YouTube where he lectures on fundamental physics and the development of the basic laws that govern physics. Anyone with an adolescent child showing an interest in the subject should have them watch Feynman. He made the world more interesting.
Feynman was the greatest Physics 101 teacher ever.

This is my favorite Feynman story, not in Genius: This Cal Tech graduate student goes to the lab early one morning and starts work, thinking that he’s alone in the building. He then hears Feynman’s unmistakable New York accent lecturing from a classroom down the hall. It’s 7 am, too early for classes, wtf? He goes to the classroom and finds the world’s greatest living physicist lecturing to an empty classroom, rehearsing his lecture for later that day. Respect.
 

A2nit

Active member
Oct 12, 2021
222
254
63
I was once really acquainted with the whole relativity thing. The brain is old and feeble now, so I do just make $H!+ up. Just ask my wife and daughter. My wife really busted me on something the other day. We were both howling at a mistake I made about a CD that we bought when we were first married. I'm laughing about it now. I am the official idiot in the family. :)
Welcome to the club 🫡
 

HarrisburgDave

Well-known member
Oct 29, 2021
934
1,351
93
Cool. I will have to watch this.
So I watched the movie. Not what I expected.

It led me to read more about the death of his young wife. So much for him to deal with in his twenties.

I came upon this letter he wrote to her, two years after her death. It was found sealed among his papers by his biographer years after his death. The letter is pure Feynman. The end? It is him.
I know that several men on here will appreciate reading this -


October 17, 1946

D’Arline,

I adore you, sweetheart.

I know how much you like to hear that — but I don’t only write it because you like it — I write it because it makes me warm all over inside to write it to you.

It is such a terribly long time since I last wrote to you — almost two years but I know you’ll excuse me because you understand how I am, stubborn and realistic; and I thought there was no sense to writing.

But now I know my darling wife that it is right to do what I have delayed in doing, and that I have done so much in the past. I want to tell you I love you. I want to love you. I always will love you.

I find it hard to understand in my mind what it means to love you after you are dead — but I still want to comfort and take care of you — and I want you to love me and care for me. I want to have problems to discuss with you — I want to do little projects with you. I never thought until just now that we can do that. What should we do. We started to learn to make clothes together — or learn Chinese — or getting a movie projector. Can’t I do something now? No. I am alone without you and you were the “idea-woman” and general instigator of all our wild adventures.

When you were sick you worried because you could not give me something that you wanted to and thought I needed. You needn’t have worried. Just as I told you then there was no real need because I loved you in so many ways so much. And now it is clearly even more true — you can give me nothing now yet I love you so that you stand in my way of loving anyone else — but I want you to stand there. You, dead, are so much better than anyone else alive.

I know you will assure me that I am foolish and that you want me to have full happiness and don’t want to be in my way. I’ll bet you are surprised that I don’t even have a girlfriend (except you, sweetheart) after two years. But you can’t help it, darling, nor can I — I don’t understand it, for I have met many girls and very nice ones and I don’t want to remain alone — but in two or three meetings they all seem ashes. You only are left to me. You are real.

My darling wife, I do adore you.

I love my wife. My wife is dead.

Rich.

PS Please excuse my not mailing this — but I don’t know your new address.
 
Last edited:
  • Sad
Reactions: LionJim

HarrisburgDave

Well-known member
Oct 29, 2021
934
1,351
93
Feynman was the greatest Physics 101 teacher ever.

This is my favorite Feynman story, not in Genius: This Cal Tech graduate student goes to the lab early one morning and starts work, thinking that he’s alone in the building. He then hears Feynman’s unmistakable New York accent lecturing from a classroom down the hall. It’s 7 am, too early for classes, wtf? He goes to the classroom and finds the world’s greatest living physicist lecturing to an empty classroom, rehearsing his lecture for later that day. Respect.
I should have written my comments on the movie after this post of yours. I put this here hoping you will see it. Thanks for the tip.
 
  • Like
Reactions: LionJim
Get unlimited access today.

Pick the right plan for you.

Already a member? Login