Physics is the foundation science upon which all other natural sciences and most types of engineering are built. This makes physics the most diverse and applicable technical major you can have. These are just a few of the things physicists study, using experiments, observations, theory, and computer simulations: optical systems, subatomic particles, exploding stars, high-powered lasers, biological cells, magnetic materials, nuclear fusion power, protein folding, planets, tsunamis, materials for computing, teleporting photons, earthquakes, black holes, and endless more topics.
In other words, physicists work to deeply understand the smallest things, the biggest things, the oldest things, the newest things, and everything in between. Physicists either invented, or made possible, such major inventions as electric power; electric motors; radio, TV, and cellular phone communication; superconductors, transistors, microprocessors, lasers, and spacecraft.
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