Modern Physics AP Concepts.doc - Modern Physics Important...

This preview shows page 1 - 2 out of 3 pages.

Modern Physics Important Concepts for AP Test Special Relativity Laws of Physics are same in all inertial reference frames Speed of light is the same regardless of velocity of observer or source of light Followed results of Michelson-Morley Experiment – null result, ether does not exist and velocity of light independent of velocity of earth Absolute length and absolute time intervals are meaningless. Simultaneity of two events is not an absolute concept but depends on the motion of the observer. Moving clocks run more slowly. (time dilation) Proper length is the longest length. (length contraction) Energy and Relativistic Momentum (equations which may be used in problem section) Rest Energy (particle at rest still has energy associated with its mass) E rest = mc 2 Energy of photons (massless) E = pc Total Energy E = K + mc 2 Pair Production and annihilation Process in which a photon creates matter. An electron and positron (positively charged particle with mass of an electron) are produced and the photon disappears. Energy, momentum, and charge must be conserved in this process.

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture