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16 godz. temu · Hubble's law, also known as the Hubble–Lemaître law, is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance. In other words, the farther they are, the faster they are moving away from Earth. The velocity of the galaxies has been determined by their redshift, a shift of the light they emit toward the red end of the visible ...
16 godz. temu · In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein 's 1905 treatment, the theory is presented as being based on just two postulates: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of reference ...
16 godz. temu · The metre is the length of the path travelled by light in vacuum during a time interval of 1 / 299 792 458 of a second. This definition fixed the speed of light in vacuum at exactly 299 792 458 metres per second (≈ 300 000 km/s or ≈1.079 billion km/hour). An intended by-product of the 17th CGPM's definition was that it enabled scientists to ...
16 godz. temu · Digital media streaming increases the demand for network bandwidth. For example, standard image quality needs 1 Mbit/s link speed for SD 480p, HD 720p quality requires 2.5 Mbit/s, and the top-of-the-line HDX quality needs 4.5 Mbit/s for 1080p. Webcams are a low-cost extension of this phenomenon. While some webcams can give full-frame-rate video ...
