l24 - Today The nature of the Universe Beyond the Standard...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
ISP209s7 Lecture 24 -1- Today • The nature of the Universe - Beyond the Standard Model – Dark Matter and Dark Energy – String Theory and the quest to unify gravity and quantum theory – Begin watching PBS NOVA special “The Elegant Universe” on String Theory
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ISP209s7 Lecture 24 -2- The goals of science • Reach an understanding based on the fundamental building blocks of nature and their interactions. • Human bias – simple is better; one equation should describe everything (goal of string theory) • The standard model is our current collection of fact. It does not answer the why question.
Background image of page 2
ISP209s7 Lecture 24 -3- How do we know what things are made of? Multi-walled carbon nanotube MSU Center for Advanced Microscopy TEM Microscope = 5x10 -9 m
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ISP209s7 Lecture 24 -4- The highest magnification possible 0.136nm separation between Si atoms TEM Image of a Silicon crystal http://www.ceo.msu.edu/ MSU Center for Advanced Microscopy Xudong Fan , MSU Image of Si [110] We can see pairs of silicon atoms.
Background image of page 4
What We Made Of? • We are made out of atoms. The size of atoms is 10 -9 m = nm • Atoms are made of nuclei and electrons (+ energy; E=mc 2 ) • Nuclei are made of neutrons and protons (plus the stuff that binds them, mesons) • Neutrons, Protons and Mesons are made of quarks (10 -16 m). We can measure down to 10 -18 m • What are quarks made of? The answer may be strings, but the size is 10 -35 m too small for us to explore (at the moment).
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

l24 - Today The nature of the Universe Beyond the Standard...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online