Solving Science Questions: A Book About the Scientific by Rachel Chappell

By Rachel Chappell

Teaches simple technology techniques via Experimentation.

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Imagine yourself standing in front of a mirror. What in reality is on your right is mirrored on your left, and your left side appears to be on the right side of the mirrored image. If your hair is parted on the right, in the mirror it appears to be parted on your left. Now imagine reversing the rest of the image, top to bottom and front to back. The law of conservation of parity says that if you take a system and switch everything around in this way, the system will still exhibit exactly the same behavior.

In other words, these particles were in all likelihood identical, since the difference in mass could be caused by the differences in charge alone. So, said Gell-Mann, what if you thought of each of these families as a single particle with another characteristic—“multiplicity”? It was a new and productive way of looking at the variety of particles to be found in an atomic nucleus. Secondly, he noticed that the strong force pays no attention at all to electric charge. It has equal effect whether a particle is neutral, negative, or positive.

SLAC (the Stanford Linear Accelerator Center), huge as it is, provides a window for seeing the infinitesimally tiny particles that make up the atom. 3 4 Science Frontiers In this aerial photograph of the Stanford Linear Accelerator Center (SLAC) in California, the two-mile-long linear accelerator extends diagonally westward. Electrons or other subatomic particles are fired like tiny bullets from the near end, accelerating as they travel the length of the accelerator, under the freeway, to smash into their miniscule targets in the experimental area at the far end.

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