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Genre: eLearning / Physics
Einstein’s Special Theory of Relativity is valid for systems that are not accelerating. Since from Newton’s second law an acceleration implies a force, special relativity is valid only when no forces act.
Thus, it cannot be used generally when there is a gravitational field present (as we shall see below in conjunction with the Principle of Equivalence, it can be used over a sufficiently localized region of spacetime).
We have already discussed some of the important implications of the Special Theory of Relativity. For example, the most famous is probably the relationship between mass and energy. Other striking consequences are associated with the dependence of space and time on velocity: at speeds near that of light, space itself becomes contracted in the direction of motion and the passage of time slows. Although these seem bizarre ideas (because our everyday experience typically does not include speeds near that of light), many experiments indicate that the Special Theory of Relativity is correct and our “common sense” (and Newton’s laws) are incorrect near the speed of light.
This Stanford course studies the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics, quantum mechanics, the general and special theories of relativity, electromagnetism, cosmology, black holes and statistical mechanics.The course also looks into quantum mechanics, with topics like the quantum world, including the particle theory of light, the Heisenberg Uncertainty Principle, and the Schroedinger Equation.The course is taught by Leonard Susskind, the Felix Bloch Professor of Physics at Stanford University.
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