My best teachers were not the ones who knew all the answers, but those who were deeply excited by questions they couldn't answer.
Brian GreeneRead
String theory is not the only theory that can accommodate extra dimensions, but it certainly is the one that really demands and requires it.
Interpretation
String theory uniquely requires extra dimensions for its mathematical framework.
This quote highlights the distinctive nature of string theory among various theoretical frameworks in physics. While other theories may incorporate extra dimensions, string theory specifically necessitates them as a fundamental aspect of its structure, suggesting a deeper and more complex understanding of the universe's fabric.
In practice
In a lecture on modern physics, one might use this quote to emphasize the uniqueness of string theory.
My best teachers were not the ones who knew all the answers, but those who were deeply excited by questions they couldn't answer.
All mathematics is is a language that is well tuned, finely honed, to describe patterns; be it patterns in a star, which has five points that are regularly arranged, be it patterns in numbers like 2, 4, 6, 8, 10 that follow very regular progression.
According to inflation, the more than 100 billion galaxies, sparkling throughout space like heavenly diamonds, are nothing but quantum mechanics writ large across the sky. To me, this realization is one of the greatest wonders of the modern scientific age.
So: if you buy the notion that reality consists of the things in your freeze-frame mental image right now, and if you agree that your now is no more valid than the now of someone located far away in space who can move freely, then reality encompasses all of the events in spacetime.
Black holes, we all know, are these regions where if an object falls in, it can't get out, but the puzzle that many struggled with over the decades is, what happens to the information that an object contains when it falls into a black hole. Is it simply lost?
Physicists are more like avant-garde composers, willing to bend traditional rules... Mathematicians are more like classical composers.
It is mere rubbish thinking, at present, of origin of life; one might as well think of origin of matter.
Extra dimensional theories are sometimes considered science fiction with equations. I think that's a wrong attitude. I think extra dimensions are with us, they are with us to stay, and they entered physics a long time ago. They are not going to go away.
We fly to 106 kilometers. We've always had as our mission that we always wanted to fly above the Karman line because we didn't want there to be any asterisks next to your name about whether you're an astronaut or not.
The law of floatation was not discovered by contemplating the sinking of things, but by contemplating the floating of things which floated naturally, and then intelligently asking why they did so.
The main reason why people should care about research in fundamental physics is the same reason they care about astronomy and cosmology. People, children, want to know what we're made out of, how it works, and why the universe is the way it is.
When the dog is repeatedly teased with the sight of objects inducing salivary secretion from a distance, the reaction of the salivary glands grows weaker and weaker and finally drops to zero.
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