ASTRON 2B03 Lecture Notes - Antiproton, Positron, Black-Body Radiation
25 Sep 2013
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Document Summary
Novel prize evidence for the acceleration of the expansion of the universe. Special relativity associated w/ very fast speeds. Speed stays constant, what changes is wavelength. In quantum mechanics, we will look deeper into the atom. Quarks are the units that made protons and neutrons. Momentum (p) = mv: falls apart in quantum world. Newton"s laws breaking down at extreme cases (moving incredibly fast). You can tell from its colour what temperature it is: if light comes in packets of quanta, you can understand the diagram. Einstein also made huge contributions to quantum mechanics. People thought light was continuous wave but it was discovered that light comes in little particles. We thought that in order to move stuff around, we needed momentum. But light has no mass, photons got none. Our idea of momentum for light must not be correct. First evidence that classical physics was breaking down. P=mv does not work for light and subatomic particles.
