Section 5 Special Relativity
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CONGRATULATIONS! You have selected a quality timepiece that will assist you in remembering tasks, managing your time and keeping focused. Perfect for reminders for medication and medical conditions, timing presentations or procedures, for cooking, parking meters and for keeping on schedule. The uses are endless. Set the “vibration” feature for alarm settings and countdown timer when you do not want to alert or disturb others or when you cannot hear an audible alarm. This unique watch has been carefully designed to give user satisfaction and to be user friendly. The large display is easy to read. Prompts are displayed to assist in easy setting. User options are easily set. Enjoy the many benefits of this wonderful watch. OPERATING MODES: CALENDAR ALARM CHRONO TIMER OPTION CLOCK (STOPWATCH) Vibra LITE 8 is a trademark of GLOBAL ASSISTIVE DEVICES, INC. Page 1 NOTE: To set any watch functions, the digit(s) that you want to set MUST BE FLASHING. When setting Calendar/Clocks, Alarms or Timer: if a delay of approx. 3 minutes occurs without buttons being pushed, digits will stop flashing and watch will return to Calendar/Clock Mode. Watch display will automatically return to Calendar/Clock Mode from Option Mode when no buttons are pushed in approx. 3 minutes. SETTING TIME OF DAY AND CALENDAR NOTE: THIS IS TIME ZONE 1 & MUST BE SET CORRECTLY FOR THE TIME OF DAY AS THE ALARMS WILL WORK BASED ON THIS TIME. Three Time Zones are available. Set Time Zone 1 for the time of day of your home location. This is the default Time and will show on the watch at all times when it is in the Calendar/Clock mode. -
The Special Theory of Relativity Lecture 16
The Special Theory of Relativity Lecture 16 E = mc2 Albert Einstein Einstein’s Relativity • Galilean-Newtonian Relativity • The Ultimate Speed - The Speed of Light • Postulates of the Special Theory of Relativity • Simultaneity • Time Dilation and the Twin Paradox • Length Contraction • Train in the Tunnel paradox (or plane in the barn) • Relativistic Doppler Effect • Four-Dimensional Space-Time • Relativistic Momentum and Mass • E = mc2; Mass and Energy • Relativistic Addition of Velocities Recommended Reading: Conceptual Physics by Paul Hewitt A Brief History of Time by Steven Hawking Galilean-Newtonian Relativity The Relativity principle: The basic laws of physics are the same in all inertial reference frames. What’s a reference frame? What does “inertial” mean? Etc…….. Think of ways to tell if you are in Motion. -And hence understand what Einstein meant By inertial and non inertial reference frames How does it differ if you’re in a car or plane at different points in the journey • Accelerating ? • Slowing down ? • Going around a curve ? • Moving at a constant velocity ? Why? ConcepTest 26.1 Playing Ball on the Train You and your friend are playing catch 1) 3 mph eastward in a train moving at 60 mph in an eastward direction. Your friend is at 2) 3 mph westward the front of the car and throws you 3) 57 mph eastward the ball at 3 mph (according to him). 4) 57 mph westward What velocity does the ball have 5) 60 mph eastward when you catch it, according to you? ConcepTest 26.1 Playing Ball on the Train You and your friend are playing catch 1) 3 mph eastward in a train moving at 60 mph in an eastward direction. -
Special Chronograph Instructions & Warranty
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Einstein's Mistakes
Einstein’s Mistakes Einstein was the greatest genius of the Twentieth Century, but his discoveries were blighted with mistakes. The Human Failing of Genius. 1 PART 1 An evaluation of the man Here, Einstein grows up, his thinking evolves, and many quotations from him are listed. Albert Einstein (1879-1955) Einstein at 14 Einstein at 26 Einstein at 42 3 Albert Einstein (1879-1955) Einstein at age 61 (1940) 4 Albert Einstein (1879-1955) Born in Ulm, Swabian region of Southern Germany. From a Jewish merchant family. Had a sister Maja. Family rejected Jewish customs. Did not inherit any mathematical talent. Inherited stubbornness, Inherited a roguish sense of humor, An inclination to mysticism, And a habit of grüblen or protracted, agonizing “brooding” over whatever was on its mind. Leading to the thought experiment. 5 Portrait in 1947 – age 68, and his habit of agonizing brooding over whatever was on its mind. He was in Princeton, NJ, USA. 6 Einstein the mystic •“Everyone who is seriously involved in pursuit of science becomes convinced that a spirit is manifest in the laws of the universe, one that is vastly superior to that of man..” •“When I assess a theory, I ask myself, if I was God, would I have arranged the universe that way?” •His roguish sense of humor was always there. •When asked what will be his reactions to observational evidence against the bending of light predicted by his general theory of relativity, he said: •”Then I would feel sorry for the Good Lord. The theory is correct anyway.” 7 Einstein: Mathematics •More quotations from Einstein: •“How it is possible that mathematics, a product of human thought that is independent of experience, fits so excellently the objects of physical reality?” •Questions asked by many people and Einstein: •“Is God a mathematician?” •His conclusion: •“ The Lord is cunning, but not malicious.” 8 Einstein the Stubborn Mystic “What interests me is whether God had any choice in the creation of the world” Some broadcasters expunged the comment from the soundtrack because they thought it was blasphemous. -
From Relativistic Time Dilation to Psychological Time Perception
From relativistic time dilation to psychological time perception: an approach and model, driven by the theory of relativity, to combine the physical time with the time perceived while experiencing different situations. Andrea Conte1,∗ Abstract An approach, supported by a physical model driven by the theory of relativity, is presented. This approach and model tend to conciliate the relativistic view on time dilation with the current models and conclusions on time perception. The model uses energy ratios instead of geometrical transformations to express time dilation. Brain mechanisms like the arousal mechanism and the attention mechanism are interpreted and combined using the model. Matrices of order two are generated to contain the time dilation between two observers, from the point of view of a third observer. The matrices are used to transform an observer time to another observer time. Correlations with the official time dilation equations are given in the appendix. Keywords: Time dilation, Time perception, Definition of time, Lorentz factor, Relativity, Physical time, Psychological time, Psychology of time, Internal clock, Arousal, Attention, Subjective time, Internal flux, External flux, Energy system ∗Corresponding author Email address: [email protected] (Andrea Conte) 1Declarations of interest: none Preprint submitted to PsyArXiv - version 2, revision 1 June 6, 2021 Contents 1 Introduction 3 1.1 The unit of time . 4 1.2 The Lorentz factor . 6 2 Physical model 7 2.1 Energy system . 7 2.2 Internal flux . 7 2.3 Internal flux ratio . 9 2.4 Non-isolated system interaction . 10 2.5 External flux . 11 2.6 External flux ratio . 12 2.7 Total flux . -
1 Meaning and Resolution of the Ladder Paradox for Special
Meaning and Resolution of the Ladder Paradox for Special Relativity Theory Tsuneaki Takahashi Abstract Regarding to the Ladder Paradox, there are some misunderstanding and insufficient understanding of the special relativity theory. Accurate recognition of the theory would make clear the core mechanism of both the theory and the paradox. 1. Introduction While there are many explanations for the Ladder paradox, we may be able to summarize the essence of these as following. About mutually and relatively moving garage and ladder, garage sees contracted ladder based on the contraction effect of special relativity theory, also ladder sees contracted garage on same reason. Then there are the cases that one side of the two linefit in the garage. This looks like a contradiction. 2. View from s system We consider about following two systems s system( 2dimensions(푐푡, 푥)) and 푠′ system(2dimensions(푐t′, 푥′)). [1] Here both are moving relatively with velocity 푣. This situation can be shown as Minkowsky graph. (Fig.1) 푥 푥′ θ α 푐푡′ θ 푐푡 Fig. 1 On Fig.2, point A stays in 푠′ system. Its track is 푃푄̅̅̅̅. This is elapse of time in 푠′ system. Also point B stays in 푠′ system. Its track is 푅푆̅̅̅̅. This is elapse of time in 푠′ system. These points A, B are simultaneous for 푠′ system but not for 푠 system. Then regarding to these two tracks, simultaneous points for 푠 system are T, U, for example. On this situation, space distance 퐴퐵̅̅̅̅ for 푠′ system is recognized as space distance 푇푈̅̅̅̅ for 푠 system. 1 푥 푥′ Q A T P S U B 푐푡′ R 푐푡 Fig. -
House Watch Application Return Completed Form To: 218-326-4663 (Fax) | 440 1St Ave NE, Grand Rapids, MN 55744 | [email protected]
House Watch The Itasca County Sheriff’s Office provides the following house watch service to the residents of Itasca County. The following rules will apply; failure to comply will result in dismissal of your house watch. 1. The house watch program is available to residents that reside year-round in Itasca County. o Any person that has seasonal property or goes out of state for the winter is not eligible for a watch. 2. The house watch programs is available if your vacation is longer than 5 days and not longer than 30 days. o Any person gone for less than 5 days should have a neighbor/friend watch the residence. o Any person gone for more than 30 days should consider having an alarm installed along with a neighbor/friend watching the residence. 3. All house watches will be performed when officers have available time. 4. Any residence that has an alarm will not be eligible. 5. The house watch program requires that access to your property be kept clear and maintained year-round. 6. The house watch programs is designed to check for vandalism, property damage, and break- ins. 7. In the event that there would be a problem with your residence, we require that a key holder be named to take care of the problem. J: SHF>Records Deputy>House Watch House Watch Application Return completed form to: 218-326-4663 (fax) | 440 1st Ave NE, Grand Rapids, MN 55744 | [email protected] Homeowner Information Name: Street Address: City: State: Zip: Telephone: Cell Phone: Dates of Vacation: Location of Vacation: Key Holder Information Key Holder #1 Name: Daytime Phone: Nighttime Phone: Key Holder #2 Name: Daytime Phone: Nighttime Phone: Additional Information: Signature Date J: SHF>Records Deputy>House Watch . -
Physics 200 Problem Set 7 Solution Quick Overview: Although Relativity Can Be a Little Bewildering, This Problem Set Uses Just A
Physics 200 Problem Set 7 Solution Quick overview: Although relativity can be a little bewildering, this problem set uses just a few ideas over and over again, namely 1. Coordinates (x; t) in one frame are related to coordinates (x0; t0) in another frame by the Lorentz transformation formulas. 2. Similarly, space and time intervals (¢x; ¢t) in one frame are related to inter- vals (¢x0; ¢t0) in another frame by the same Lorentz transformation formu- las. Note that time dilation and length contraction are just special cases: it is time-dilation if ¢x = 0 and length contraction if ¢t = 0. 3. The spacetime interval (¢s)2 = (c¢t)2 ¡ (¢x)2 between two events is the same in every frame. 4. Energy and momentum are always conserved, and we can make e±cient use of this fact by writing them together in an energy-momentum vector P = (E=c; p) with the property P 2 = m2c2. In particular, if the mass is zero then P 2 = 0. 1. The earth and sun are 8.3 light-minutes apart. Ignore their relative motion for this problem and assume they live in a single inertial frame, the Earth-Sun frame. Events A and B occur at t = 0 on the earth and at 2 minutes on the sun respectively. Find the time di®erence between the events according to an observer moving at u = 0:8c from Earth to Sun. Repeat if observer is moving in the opposite direction at u = 0:8c. Answer: According to the formula for a Lorentz transformation, ³ u ´ 1 ¢tobserver = γ ¢tEarth-Sun ¡ ¢xEarth-Sun ; γ = p : c2 1 ¡ (u=c)2 Plugging in the numbers gives (notice that the c implicit in \light-minute" cancels the extra factor of c, which is why it's nice to measure distances in terms of the speed of light) 2 min ¡ 0:8(8:3 min) ¢tobserver = p = ¡7:7 min; 1 ¡ 0:82 which means that according to the observer, event B happened before event A! If we reverse the sign of u then 2 min + 0:8(8:3 min) ¢tobserver 2 = p = 14 min: 1 ¡ 0:82 2. -
Simulating Gamma-Ray Binaries with a Relativistic Extension of RAMSES? A
A&A 560, A79 (2013) Astronomy DOI: 10.1051/0004-6361/201322266 & c ESO 2013 Astrophysics Simulating gamma-ray binaries with a relativistic extension of RAMSES? A. Lamberts1;2, S. Fromang3, G. Dubus1, and R. Teyssier3;4 1 UJF-Grenoble 1 / CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, 38041 Grenoble, France e-mail: [email protected] 2 Physics Department, University of Wisconsin-Milwaukee, Milwaukee WI 53211, USA 3 Laboratoire AIM, CEA/DSM - CNRS - Université Paris 7, Irfu/Service d’Astrophysique, CEA-Saclay, 91191 Gif-sur-Yvette, France 4 Institute for Theoretical Physics, University of Zürich, Winterthurestrasse 190, 8057 Zürich, Switzerland Received 11 July 2013 / Accepted 29 September 2013 ABSTRACT Context. Gamma-ray binaries are composed of a massive star and a rotation-powered pulsar with a highly relativistic wind. The collision between the winds from both objects creates a shock structure where particles are accelerated, which results in the observed high-energy emission. Aims. We want to understand the impact of the relativistic nature of the pulsar wind on the structure and stability of the colliding wind region and highlight the differences with colliding winds from massive stars. We focus on how the structure evolves with increasing values of the Lorentz factor of the pulsar wind, keeping in mind that current simulations are unable to reach the expected values of pulsar wind Lorentz factors by orders of magnitude. Methods. We use high-resolution numerical simulations with a relativistic extension to the hydrodynamics code RAMSES we have developed. We perform two-dimensional simulations, and focus on the region close to the binary, where orbital motion can be ne- glected. -
Relativity -1
Relativity -1 Special Relativity After Newton and his mechanics, after Maxwell and his E&M, came three great revolutionary new theories of the 20th century. Albert Einstein was responsible for 2 and one-quarter of these theories. 1) Special Relativity, a theory of space and time (Einstein 1905) 2) General Relativity, a theory of gravity (Einstein, 1916) 3) Quantum Mechanics, a theory of the behavior of atoms (Planck, Einstein, Bohr, Heisenberg, Schrodinger, Born, Dirac, Pauli, …, 1900-1928) Comment about the word "theory": In science, the word "theory" means "a self-consistent model which is consistent with all known experimental facts and which makes specific predictions which can be tested by further experiment." This is a very different meaning than the common use of the word : In street talk, the word "theory" seems to mean "conjecture" or "some random notion", as in "it's just a theory". This is exactly the opposite of the meaning of the word in science: In science, a "theory" is the most complete, reliable form of knowledge (about the physical universe) that we possess. Special Relativity is based on 2 postulates (axioms) I. All the laws of physics are in the same in every inertial frame of reference. Inertial frame = one moving at constant velocity = one which is not accelerating, not rotating. II. (the weird one). The speed of light is the same for all observers regardless of the motion of the observer or the motion of the source of the light. Postulate I says that there is no way to determine the velocity of your inertial frame, except by comparing your motion to the motion of other bodies. -
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Doppler Boosting and Cosmological Redshift on Relativistic Jets
Doppler Boosting and cosmological redshift on relativistic jets Author: Jordi Fernández Vilana Advisor: Valentí Bosch i Ramon Facultat de Física, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain. Abstract: In this study our goal was to identify the possible effects that influence with the Spectral Energy Distribution of a blazar, which we deducted that are Doppler Boosting effect and cosmological redshift. Then we investigated how the spectral energy distribution varies by changing intrinsic parameters of the jet like its Lorentz factor, the angle of the line of sight respect to the jet orientation or the blazar redshift. The obtained results showed a strong enhancing of the Spectral Energy Distribution for nearly 0º angles and high Lorentz factors, while the increase in redshift produced the inverse effect, reducing the normalization of the distribution and moving the peak to lower energies. These two effects compete in the observations of all known blazars and our simple model confirmed the experimental results, that only those blazars with optimal characteristics, if at very high redshift, are suitable to be measured by the actual instruments, making the study of blazars with a high redshift an issue that needs very deep observations at different wavelengths to collect enough data to properly characterize the source population. jet those particles are moving at relativistic speeds, producing I. INTRODUCTION high energy interactions in the process. This scenario produces a wide spectrum of radiation that mainly comes, as we can see in more detail in [2], from Inverse Compton We know that active galactic nuclei or AGN are galaxies scattering. Low energy photons inside the jet are scattered by with an accreting supermassive blackhole in the centre.