[ Information | Background | The CyberTeaser | Quantum News | Miscellaneous Stuff ] Contents of the May/June 1997 issue of QuantumFeature articlesOn Kaleidoscopesby E. B. VinbergA look at kaleidoscopes that takes you well beyond the simple tubular toy—into hyperbolic space, in fact! Does Elementary Length Exist?by Andrey SakharovThe great Soviet physicist and human rights activist discusses one of the basic questions in the field of particle physics: is there, in principle, a limitation on the applicability of modern science’s basic ideas about space and causality? Irrationality and Irreducibilityby V. A. OleynikovThe ancient Greeks knew that the square root of 2 is irrational. Later it became clear that the polynomial x^{2} – 2 = 0 is irreducible. What’s the connection? A Clock Wound for All Timeby V. I. KuznetsovThe Earth is a timepiece that can measure its own age—almost! DepartmentsKaleidoscope: Let’s Not Be Dense About It!by A. A. Leonovich“It” here is the concept of density. How well do you understand it? Physics Contest: Color Creationby Arthur Eisenkraft and Larry D. KirkpatrickHow “thin film interference” affects how colors are created in soap bubbles and oil slicks, and how they differ from those produced by a prism or raindrop. Cowculations: Slipping Silageby Dr. MuSomeone was stealing the hay. He was caught, but the insurance company wants to know how much was stolen. Can you help figure it out? At the Blackboard I: Magnets, Charges, and Planetsby Albert StasenkoInvestigating an analogy between magnetism and gravity. Toy Store: Rubik ArtHuge patterned cubes formed from many Rubik’s Cubes—a pastime of physicist Hana Bizek of Argonne National Laboratory. At the Blackboard II: Adding Angles in Three Dimensionsby A. Shirshov and A. NikitinTaking a theorem for plane figures into the realm of polyhedrons.
At the Blackboard III: Fair and Squared!by Boris KorsunskyWhat to do when a physics problem has been “reduced” to a math problem involving a quadratic equation. Math Investigations: Farewell to JCMNby George BerzsenyiA fond look at the James Cook Mathematical Notes and its creator, Basil Rennie. How Do You Figure?: Challenges in Physics and MathBrainteasers: Just for the Fun of It!HappeningsThe Quantum Bulletin Board. Crisscross ScienceScientific crossword puzzle. Answers, Hints & SolutionsQuantum Control Panel Copyright © 1997 National
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