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Archive for Luglio, 2019:
RELATIVITATEA pentru toţi
„In this video we go into the core features of special relativity, as well as touching upon general relativity. Special relativity is all about the exchange of information insofar as the speed of light imposes limits on when and how we receive information. Whatever we can detect by our instruments or our senses has an inherent latency to it. That latency comes from the fact that it takes time for information to reach us. In space and time, the transfer of information is never instantaneous. When we take this fact and combine it with movement and acceleration, we get some interesting conclusions. The way we move, where we move, and how we move all determine how we receive or send information. That, in a nutshell, is what makes the Lorentz transformations do what they do. It’s why the relativistic doppler effect exists, and it’s why there’s such a thing as time dilation, length contraction, and redshift and blueshift. The video surveys some special general-relativistic examples of why photons gain frequency in a gravitational field, or why redshifting and blueshifting can also be caused by spacetime expansion.”
Tags: Relativitatea
