Magnetic Moment - Sixty Symbols

Check out Professor Bowtell's dodgy compass in this film explaining magnetic moments.

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Parabolic mirrors

An optical illusion with parabolic mirrors. The image of the object is produced in the focus of bottom parabolic mirror.

Electrons - Sixty Symbols

The electron: wave or particle?

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Yale: Frontiers and Controversies in Astrophysics, Lecture 19

ASTR 160 - Frontiers and Controversies in Astrophysics
Professor Charles Bailyn
Spring 2007
Source: Yale University, Open Yale Courses

Omega and the End of the Universe



Omega is the actual density of the universe divided by its critical density:  if it is greater than 1, there will be a big crunch; if it is lesse than 1, the universe will expand forever.  Evaluating omega is not easy, partly because of dark matter (WIMPs:Weakly Interactive Massive Particles, and MACHOs:  Massive Astrophysical Compact Halo Objects).

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Three Incorrect Laws of Motion

Newton's Three Laws of Motion are a landmark achievement in physics. They describe how all objects move. Unfortunately most people do not really understand Newton's Laws because they have pre-existing ideas about the way the world works. This film is about those pre-existing ideas. By recognizing what people are thinking, it becomes easier to describe the correct scientific concepts of Newton's Three Laws and how they differ from this 'intuitive physics'.

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