Lecture.1.part2 - e forces e forces the forces the forces...

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Unformatted text preview: e forces e forces the forces the forces electromagnetic ( photon ) weak ( W + W- Z ) strong ( 8 gluons ) ravitational raviton gravitational ( graviton not yet observed ) all have spin = 1 (or 2 for graviton) they are bosons some particle some particle hysics puzzles hysics puzzles physics puzzles physics puzzles While we have learned a great deal in the 20 th century, there are still many ings hich re ot nown things which are not known. Dark Energy: http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy / http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy / Dark Energy What Is Dark Energy? ore is unknown than is known We know how much dark More is unknown than is known. We know how much dark energy there is because we know how it affects the Universe's expansion. Other than that, it is a complete mystery. But it is an important mystery. It turns out that roughly 70% of the Universe is dark energy. Dark matter makes up about 25%....
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This note was uploaded on 08/25/2011 for the course PHYSICS 357 taught by Professor Hale,b during the Spring '08 term at Missouri S&T.

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Lecture.1.part2 - e forces e forces the forces the forces...

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