![]() This figure shows that the R(t) curve is not simply what you say but can be shaped different ways depending on the assumptions about the cosmological constant etc. Give us an online source for that formula, and i bet we can show you where it says that the formula only applies to a special (artificially simple) case. Would it help if i tell you that R(t) is proportional to t^(2/3)īut detty! that formula is not right, it applies only to a simple caseįor the real universe it is not true that the scale factor R(t) is proportional to t^(2/3) From the above equations, we get Red shift as follows. ![]() Here, since the source is moving away from the observer, v is positive. This section describes the mathematical operators and functions supported in Amazon Redshift. Ned wright already has these default values of the cosmological parameters set for you so he makes you do less work.īoth calculators give the same answer, as you might expect where s is the wavelength of the signal at the source and o is the wavelength of the signal as interpreted by the observer. With her calculator you must type in 0.27 for Omega (matter fraction) and 0.73 for Lambda (cosmological constant or dark energy fraction) and 71 for the Hubble parameter. However siobhan morgan's is fun to play with because she gives recession speeds too, which ned does not. This will give the answer 0.482 billion years Just go there, put 10 into the z box, don't change anything else They are both put up by astronomy professors to help their students. If you need help using the calculators, just say. ![]() The wavelength of light increases as it traverses the expanding universe between its point. ![]() You will find that the distance has increased and became the observed wavelength, which is - v t + v / c ( 1 + v c). Cosmological Redshift is a redshift caused by the expansion of space. How do i find the age of the universe if it was a redshift at say 10?ĭo i have to find the scale factor first? Namely, draw waves as consecutive parallel lines moving at velocity c whose distance is (if the source is not moving) and let the source move away at v. The age of the universe now is 13 billion years old (and a critical universe). Hi i am confused as to how to calculate the age of the universe with redshift ![]()
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