Accelerated Expansion of Space, Dark Matter, Dark Energy and Big
... universe had then to be the simplest possible one. Lemaître could thus justify his assumption that R ( 0 ) = 0 , but he wanted also to know if our universe is really expanding. He knew that the speed of recession of stellar objects can be determined by measuring the red-shift of spectral lines. Vest ...
... universe had then to be the simplest possible one. Lemaître could thus justify his assumption that R ( 0 ) = 0 , but he wanted also to know if our universe is really expanding. He knew that the speed of recession of stellar objects can be determined by measuring the red-shift of spectral lines. Vest ...
Unweaving the Fabric of the Universe: The Interplay between
... equations considering Einstein’s theory as an effective theory valid at lower energy scales. Moreover, it is hoped that Quantum Gravity may shed some light on the nature of the inflaton field. Note that there are unresolved puzzles of the Hot Big Bang model, referring to the initial singularity, bar ...
... equations considering Einstein’s theory as an effective theory valid at lower energy scales. Moreover, it is hoped that Quantum Gravity may shed some light on the nature of the inflaton field. Note that there are unresolved puzzles of the Hot Big Bang model, referring to the initial singularity, bar ...
Test 2 - Physics@Brock
... (a) a high concentration of swimming pools, sports cars, and affected accents. (b) more than one million galaxies. (c) more than one thousand galaxies. (d) more than one hundred galaxies. 18. A common result of a galaxy collision is (a) the creation of several “child” galaxies. (b) the formation of ...
... (a) a high concentration of swimming pools, sports cars, and affected accents. (b) more than one million galaxies. (c) more than one thousand galaxies. (d) more than one hundred galaxies. 18. A common result of a galaxy collision is (a) the creation of several “child” galaxies. (b) the formation of ...
Questions - Clever Teach
... Suggest why, when a galaxy has a very large red-shift, some of its visible light is not detected through the Earth’s atmosphere. ...
... Suggest why, when a galaxy has a very large red-shift, some of its visible light is not detected through the Earth’s atmosphere. ...
J s - Ece.umd.edu
... where the proportionality constant, σ = -ρeµe, is a macroscopic constitutive parameter of the medium called conductivity. Isotropic materials for which the linear relation J = σE are called ohmic media. The unit for σ is (A/V.m).or (S/m). The reciprocal of conductivity is called resistivity, in (Ω.m ...
... where the proportionality constant, σ = -ρeµe, is a macroscopic constitutive parameter of the medium called conductivity. Isotropic materials for which the linear relation J = σE are called ohmic media. The unit for σ is (A/V.m).or (S/m). The reciprocal of conductivity is called resistivity, in (Ω.m ...
2. The Three Pillars of the Big Bang Theory
... the Earth or the Sun had even formed. There is a price we have to pay for this amazing view of the universe. The light of stars like our Sun that peaks in the visible part of the spectrum gets shifted in wavelength into the infrared part of the spectrum for high redshifts. To explore the high redshi ...
... the Earth or the Sun had even formed. There is a price we have to pay for this amazing view of the universe. The light of stars like our Sun that peaks in the visible part of the spectrum gets shifted in wavelength into the infrared part of the spectrum for high redshifts. To explore the high redshi ...
Cosmology and Science - Gurdjieff and the Fourth Way: A Critical
... ‘descriptions of reality as it is’ but, rather, ever-changing forms of insight, which can point to or indicate a reality that is implicit and not describable in its totality.” Instead of supposing that older theories are falsified at a certain point in time, we merely say that man is continually de ...
... ‘descriptions of reality as it is’ but, rather, ever-changing forms of insight, which can point to or indicate a reality that is implicit and not describable in its totality.” Instead of supposing that older theories are falsified at a certain point in time, we merely say that man is continually de ...
PH 223 Recitation Homework - Physics | Oregon State University
... One-hundred and eight electrons are equally spaced around a circle of radius 10.0 cm. (A) What is the electric field at the center of the circle? Explain your reasoning. (B) What would be the electric field be at the same location if one electron was removed? Label the location of electron before it ...
... One-hundred and eight electrons are equally spaced around a circle of radius 10.0 cm. (A) What is the electric field at the center of the circle? Explain your reasoning. (B) What would be the electric field be at the same location if one electron was removed? Label the location of electron before it ...
Section9 - University of Chicago
... evidence for a change in galaxy populations came in the 1980s from observations of something now known as the Butcher-Oemler effect. Basically this is the observation that distant clusters of galaxies have proportionately more blue (actively star ...
... evidence for a change in galaxy populations came in the 1980s from observations of something now known as the Butcher-Oemler effect. Basically this is the observation that distant clusters of galaxies have proportionately more blue (actively star ...
1 December 2014 An Update on the Universe Professor Ian Morison
... temperatures of at least a billion degrees − would do the job nicely as the heavy elements would crash together and split up into their constituent protons, neutrons and electrons. An undeniable consequence of both these predictions is that such a hot phase in the life of the early Universe would ha ...
... temperatures of at least a billion degrees − would do the job nicely as the heavy elements would crash together and split up into their constituent protons, neutrons and electrons. An undeniable consequence of both these predictions is that such a hot phase in the life of the early Universe would ha ...
PHYSICS 208 Final Exam Sections 524, 526, 528 Spring, 2007
... a) A rod with resistance R is pushed with a velocity v along the two parallel, horizontal rails that are a distance l apart. The rails have no resistance and are connected by a capacitor C. There is a constant uniform magnetic field as shown. If the capacitor has zero charge at t=0, find the charge ...
... a) A rod with resistance R is pushed with a velocity v along the two parallel, horizontal rails that are a distance l apart. The rails have no resistance and are connected by a capacitor C. There is a constant uniform magnetic field as shown. If the capacitor has zero charge at t=0, find the charge ...
Big Bang and Steady State Theories
... Full marks could be obtained by a clear description of the observation of red-shift of light from galaxies together with either an appreciation of its significance in terms of an expanding universe or some detail about the process. This should lead to a brief description about how this supported the ...
... Full marks could be obtained by a clear description of the observation of red-shift of light from galaxies together with either an appreciation of its significance in terms of an expanding universe or some detail about the process. This should lead to a brief description about how this supported the ...
Problem Set 6
... Explain the following statement: you are relatively safe inside a metal car during a thunderstorm−you may get cooked, if lightning strikes, but you will not be electrocuted. Question B Long-distance electric-power transmission lines always operate at very high voltage, sometimes as much as 750 kV. W ...
... Explain the following statement: you are relatively safe inside a metal car during a thunderstorm−you may get cooked, if lightning strikes, but you will not be electrocuted. Question B Long-distance electric-power transmission lines always operate at very high voltage, sometimes as much as 750 kV. W ...
red shift - Scoilnet
... The second piece of evidence is called the ________ microwave background. When the Universe began, there was a huge expansion and lots of ________ produced. This created a lot of _______ rays (or _______ radiation) which bounced around without being _________ . When we look out with our telescopes, ...
... The second piece of evidence is called the ________ microwave background. When the Universe began, there was a huge expansion and lots of ________ produced. This created a lot of _______ rays (or _______ radiation) which bounced around without being _________ . When we look out with our telescopes, ...
New layout
... cost, as the budget is approximately half of our annual operating budget. There remains $600 or so in the Casino account that would not have to be repaid but that is the maximum amount that the Club could afford to subsidize this project. The Planetarium seats 240 people which at a maximum charge of ...
... cost, as the budget is approximately half of our annual operating budget. There remains $600 or so in the Casino account that would not have to be repaid but that is the maximum amount that the Club could afford to subsidize this project. The Planetarium seats 240 people which at a maximum charge of ...
Chapter 7
... by freeze-out at smaller z is correct. We do this by setting up a reaction rate equation for the production and destruction of some particle species, which we call s. Let us call the number density of this species n s . Such a particle can be created by a collision between two other particles, who’s ...
... by freeze-out at smaller z is correct. We do this by setting up a reaction rate equation for the production and destruction of some particle species, which we call s. Let us call the number density of this species n s . Such a particle can be created by a collision between two other particles, who’s ...
Looking back in time to the big bang theory
... Element can be used as part of teaching this topic or as a consolidation. Learners should be introduced to at least one alternative theory to the Big Bang and reasons why the evidence supports the Big Bang rather than these other theories. Common difficulties and misconceptions include learners thin ...
... Element can be used as part of teaching this topic or as a consolidation. Learners should be introduced to at least one alternative theory to the Big Bang and reasons why the evidence supports the Big Bang rather than these other theories. Common difficulties and misconceptions include learners thin ...
Fall 2003 Qualifying Exam
... An electron is contained in a one dimensional potential well, having a potential energy of 0 when between x = 0 and x = 8 nm, and a potential energy of for all other values of x. (a) Write Schroedinger’s equation for this problem, obtain well-behaved solutions, and determine the energy eigenvalues ...
... An electron is contained in a one dimensional potential well, having a potential energy of 0 when between x = 0 and x = 8 nm, and a potential energy of for all other values of x. (a) Write Schroedinger’s equation for this problem, obtain well-behaved solutions, and determine the energy eigenvalues ...
01. State of Physics - University of Central Florida
... automobile, listen to radio, watch TV, travel on an airplane or benefit from some advance in medicine and don’t think of the events in science which made these modern marvels possible. We are concerned with how we came to understand the science that underlies our technological society, who were the ...
... automobile, listen to radio, watch TV, travel on an airplane or benefit from some advance in medicine and don’t think of the events in science which made these modern marvels possible. We are concerned with how we came to understand the science that underlies our technological society, who were the ...
Star Planet - Stony Brook Astronomy
... will watch it disperse over the next 10,000 Earth years. B. In reality, the supernova remnant has already dispersed, but we will watch it disperse over the next 10,000 Earth years. C. The image of the supernova dispersing will not reach us for another 2.6 million years. D. We will never see the s ...
... will watch it disperse over the next 10,000 Earth years. B. In reality, the supernova remnant has already dispersed, but we will watch it disperse over the next 10,000 Earth years. C. The image of the supernova dispersing will not reach us for another 2.6 million years. D. We will never see the s ...
ASTR 105 Intro Astronomy: The Solar System
... • When dealing with really big quantities, the small details become trivial – For example, when we say that the nearest galaxy is 2 million (2,000,000) light-years away, does it really matter if its actually 2,000,001? ...
... • When dealing with really big quantities, the small details become trivial – For example, when we say that the nearest galaxy is 2 million (2,000,000) light-years away, does it really matter if its actually 2,000,001? ...
Slide 1
... be decelerating due to the attractive gravitational forces of galaxies on each other. Therefore there appears to be some unknown repulsive force acting which is releasing some hidden ‘potential’ energy which is currently known as dark energy. ...
... be decelerating due to the attractive gravitational forces of galaxies on each other. Therefore there appears to be some unknown repulsive force acting which is releasing some hidden ‘potential’ energy which is currently known as dark energy. ...
From B-Modes to Quantum Gravity and Unification of Forces∗
... mechanical. Note that if factors of ~ and c are made explicit in Eqn. (3), our dimensional analysis is consistent with that microscopic calculation. As seen from Eqn. (4), the BICEP result suggests a scale of inflation of Einflation ≈ 2 × 1016 GeV. Remarkably, that same scale appears in quite a diff ...
... mechanical. Note that if factors of ~ and c are made explicit in Eqn. (3), our dimensional analysis is consistent with that microscopic calculation. As seen from Eqn. (4), the BICEP result suggests a scale of inflation of Einflation ≈ 2 × 1016 GeV. Remarkably, that same scale appears in quite a diff ...
Q1. Describe, in as much detail as you can: • the evidence that the
... (a) A student listens to the sound waves produced by a car siren. When the car is stationary, the student hears a constant frequency sound. Describe how the wavelength and frequency of the sound waves heard by the student change when the car is driven away from the student. ...
... (a) A student listens to the sound waves produced by a car siren. When the car is stationary, the student hears a constant frequency sound. Describe how the wavelength and frequency of the sound waves heard by the student change when the car is driven away from the student. ...
Gonzalez-MestresPreBigBang
... pattern. => Make it “relativistic”, perhaps with some finite (superbradyonic ?) critical speed, or keep the SU(2) scheme with a preferred reference frame right from the beginning ? => In both cases, standard Lorentz symmetry may be only a “local” property of standard matter and a local preferred ref ...
... pattern. => Make it “relativistic”, perhaps with some finite (superbradyonic ?) critical speed, or keep the SU(2) scheme with a preferred reference frame right from the beginning ? => In both cases, standard Lorentz symmetry may be only a “local” property of standard matter and a local preferred ref ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.