Symmetry writer Mike Perricone’s favorite physics books of 2020 cover an impressive span of time: from the very beginning of our universe until the very end. How do the questions Galileo faced in the ...
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In physics, tensors are often a mixture of several vector spaces and several dual spaces. It also makes sense to sort both kinds as the tensor product isn’t commutative. Type (p,q) Tensors Definition: A tensor of type of with contravariant and covariant components is an element (vector) of By (1) this tensor is linear in all its components.
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All undergraduate physics majors are shown how the counterintuitive aspects (“mysteries”) of time dilation and length contraction in special relativity (SR) follow from the light postulate, i.e., that everyone measures the same value for the speed of light c, regardless of their motion relative to the source (see this Insight, for example).