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# Symmetry and Physics

Symmetry and Physics. Origin Greeks Copernicus &amp; Kepler 19th century 20th century. 1. Origin of Concept of Symmetry. Painting Sculpture Music Literature Architecture. 2. Greeks. Harmony of the Spheres Dogma of the Circles. Copernicus (1473-1543) Kepler (1571-1630).

## Symmetry and Physics

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### Presentation Transcript

1. Symmetry and Physics

2. Origin • Greeks • Copernicus & Kepler • 19th century • 20th century

3. 1. Origin of Concept of Symmetry

4. Painting Sculpture Music Literature Architecture

5. 2. Greeks

6. Harmony of the Spheres Dogma of the Circles

7. Copernicus (1473-1543) Kepler (1571-1630)

8. Six planets: Saturn, Jupiter, Mars, Earth, Venus, Mercury

9. Choose some mathe- matical regularity resulting from symmetry require- ments.(b) Match it to observed regularity.

10. Discussed why snow flakes are 6-sided • Albertus Magnus:+1260 • In China: -135

11. But no effort to try to explain why.

12. 19th Century Groups and Crystals

13. Galois (1811-1832)

14. Concept of groups is the mathematical representation of concept of symmetry.

15. Symmetry and invariance

16. A 90° rotation is called a 4-fold rotation.

17. It will be denoted by 4. It is an invariant element of the graph.

18. 3 dimensional 230 (1890) 2 dimensional 17 (1891) 4 dimensional 4895 (~1970)

19. 5. 20th Century

20. Special Relativity 1905 Lorentz Symmetry

21. General Relativity 1916 Very Large Symmetry

22. Quantum Numbers, spin, parity

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