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trevor white
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I have looked but do not seem to be able to pin down how Hubble's Constant deals with Gravity. Is it considered as Newtonian or Einstein special theory?
I don't think that's a fair representation of what's going on in there.trevor white said:The assumption in this maths appears to indicate a bias towards an expanding universe
Compounding in what way? Since redshift is a necessary result of expansion, and expansion (or contraction) is the large-scale behaviour of matter whose dynamics are governed by gravity, then one could say with some degree of accuracy that redshift is the result of gravity. I.e., gravity is why there's the redshift in the first place.trevor white said:This does not appear to treat gravity as a compounding factor in the red shift of light.
The term "red shift" refers to the phenomenon of light being shifted towards the red end of the spectrum. This occurs when the source of light is moving away from the observer. It is an important concept in astronomy and is used to measure the distance and velocity of objects in space.
The red shift of light from distant galaxies is evidence of the expansion of the universe. This is because the further away a galaxy is, the faster it appears to be moving away from us, resulting in a greater red shift. This supports the theory of the Big Bang, which suggests that the universe is constantly expanding.
The equation for calculating red shift is z = (Δλ/λ), where z is the red shift, Δλ is the change in the wavelength of light, and λ is the original wavelength of light. This equation is used to determine the distance and velocity of objects in space, as well as the expansion rate of the universe.
The math for gravity plays a crucial role in understanding red shift. In general relativity, gravity is described as the curvature of spacetime caused by the presence of matter and energy. This curvature affects the path of light, causing it to shift towards the red end of the spectrum when passing through regions of strong gravity, such as near massive objects like galaxies and black holes.
Yes, red shift can be used to measure the mass of galaxies. By measuring the red shift of light from different parts of a galaxy, scientists can determine the galaxy's rotational speed and use this to calculate its mass. This is known as the Tully-Fisher relation and is an important tool for understanding the distribution of matter in the universe.