scholarly journals What is time dilation and why we can't travel at more than that of c and also can't go in past.

2020 ◽  
Author(s):  
Sarvesh Gharat
Keyword(s):  
Relative Velocity ◽  
Time Dilation ◽  
Speed Of Light ◽  
Important Thing ◽  
Different Types

In this article we are going to see what exactly is time dilation, different types of time dilations like gravitational time dilation and velocity time dilation and the most important thing that we need to see is why we can't travel at the speed of light. With this we will also see that even though we travel at speeds comparable to c still why our relative velocity won't cross the speed of light.

Energy and Momentum

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Time Dilation ◽  
Speed Of Light ◽  
Massless Particles ◽  
The Everyday ◽  
Low Speeds ◽  
Energy And Momentum ◽  
Deep Relationship ◽  
Insight Into ◽  
Momentum Relation

Tis chapter explains the famous equation E = mc2 as part of a wider relationship between energy, mass, and momentum. We start by defning energy and momentum in the everyday sense. We then build on the stretching‐triangle picture of spacetime vectors developed in Chapter 11 to see how energy, mass, and momentum have a deep relationship that is not obvious at everyday low speeds. When momentum is zero (a mass is at rest) this energy‐momentum relation simplifes to E = mc2, which implies that mass at rest quietly stores tremendous amounts of energy. Te energymomentum relation also implies that traveling near the speed of light (e.g., to take advantage of time dilation for interstellar journeys) will require tremendous amounts of energy. Finally, we look at the simplifed form of the energy‐momentum relation when the mass is zero. Tis gives us insight into the behavior of massless particles such as the photon.

scholarly journals Art and Science Einstein’s Universe via Art

2018 ◽  
pp. 1-3
Keyword(s):  
Relative Velocity ◽  
Speed Of Light ◽  
Art And Science

The essence of Einstein’s world lies in the concept of relativity. He described it once in the following way: "When you sit with a nice girl for two hours, it seems like two minutes. When you sit on a hot stove for two minutes, it seems like two hours; that's relativity he said." Einstein also boldly stated that there are no absolute quantities, that the magnitude of quantities depends on the relative velocity between an object and the observer, and that every event and measurement is viewed differently depending on the observer's velocity. However, the only measurement that remains constant is the speed of light C in vacuum.

scholarly journals Dilation of Time Dilation

2017 ◽  
Vol 9 (6) ◽  
pp. 67
Author(s):  
Tadeusz Wajda
Keyword(s):  
Light Pulse ◽  
Michelson Interferometer ◽  
Time Dilation ◽  
Constant Time ◽  
Theory Of Relativity ◽  
Speed Of Light ◽  
Time Intervals ◽  
Interference Fringes ◽  
Fundamental Error ◽  
Transportation Speed

The study addresses the issue of the so-called time dilation in the sense of the origin of its creation and the physical existence.Based on the work of Lorentz, who the lack of displacement of interference fringes in the Michelson interferometer explained wrongly with, shortening one arm of the interferometer, I propose the construction of the light pulse clock, in which to measure the rate of the passage of time is used constancy speed of light in vacuum.Light clock, the construction of which is described in the paper, stationary in relation to the ether, will measure constant time intervals. The same clock transported, will slow down the pace of his walk as a function of transportation speed v and that is a novelty, will slow depending on its orientation relative to the direction of motion. Light clock transported transversely with respect to the stationary clock will slow gamma times, transported lengthwise will slow gamma to the second power.Basing on the obtained dependences I maintain that time dilation defined in the theory of relativity (SR) as the slowing of the lapse of time, does not physically exist and identification the varying pace of walk clock with the pace of lapse of time I consider a fundamental error resulting from the postulates of this theory.

scholarly journals Gravitational Fields and Gravitational Waves

2021 ◽  
Author(s):  
Tony Yuan
Keyword(s):  
Gravitational Field ◽  
Gravitational Waves ◽  
Doppler Effect ◽  
Relative Velocity ◽  
Gravitational Force ◽  
Speed Of Light ◽  
Finite Velocity ◽  
Gravitational Fields ◽  
Light Waves ◽  
The Doppler Effect

Abstract For any object with finite velocity, the relative velocity between them will affect the effect between them. This effect can be called the chasing effect (general Doppler effect). LIGO discovered gravitational waves and measured the speed of gravitational waves equal to the speed of light c. Gravitational waves are generated due to the disturbance of the gravitational field, and the gravitational waves will affect the gravitational force on the object. We know that light waves have the Doppler effect, and gravitational waves also have this characteristic. The article studies the following questions around gravitational waves: What is the spatial distribution of gravitational waves? Can the speed of the gravitational wave represent the speed of the gravitational field (the speed of the action of the gravitational field on the object)? What is the speed of the gravitational field? Will gravitational waves caused by the revolution of the sun affect planetary precession?

Scaffolds and Tissue Engineering Applications by 3D Bio-Printing Process

2021 ◽  
pp. 718-733
Author(s):  
Ranjit Barua ◽  
Sudipto Datta ◽  
Pallab Datta ◽  
Amit Roy Chowdhury
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Manufacturing Process ◽  
Cross Linking ◽  
Engineering Applications ◽  
Printing Process ◽  
Important Thing ◽  
Bone Scaffolds ◽  
Complex Design ◽  
Different Types

3D bio-printing is a revolutionary manufacturing process that is widely used in medical fields especially in preparing bone scaffolds and tissue engineering. With the help of new biocompatible material like polymers, bio-gels, ceramics, this technology has created a new site in advanced tissue engineering and scaffolds manufacturing area. Another important thing is that, with the use of CAD file software, any complex design can be prepared (i.e., this technology does not have any limited sites). But here it is very much essential to study and analyze machine printability characteristics, cross-linking time and biocompatibility of printing objects as well as bio-ink. However, mechanical properties like shear thinning, mechanical elasticity are also required. In this chapter, different types of scaffold-preparing methods and the bio-printing process are discussed, which are used in scaffold and tissue engineering.

scholarly journals Swarming and pattern formation due to selective attraction and repulsion

2012 ◽  
Vol 2 (6) ◽  
pp. 746-756 ◽  
Author(s):  
Pawel Romanczuk ◽  
Lutz Schimansky-Geier
Keyword(s):  
Driving Force ◽  
Relative Velocity ◽  
Collective Motion ◽  
Coarse Grained ◽  
Necessary Condition ◽  
Analytical Prediction ◽  
The Social ◽  
Different Types ◽  
Different Response ◽  
Interesting Alternative

We discuss the collective dynamics of self-propelled particles with selective attraction and repulsion interactions. Each particle, or individual, may respond differently to its neighbours depending on the sign of their relative velocity. Thus, it is able to distinguish approaching (coming closer) and retreating (moving away) individuals. This differentiation of the social response is motivated by the response to looming visual stimuli and may be seen as a generalization of the previously proposed escape and pursuit interactions motivated by empirical evidence for cannibalism as a driving force of collective migration in locusts and Mormon crickets. The model can account for different types of behaviour such as pure attraction, pure repulsion or escape and pursuit, depending on the values (signs) of the different response strengths. It provides, in the light of recent experimental results, an interesting alternative to previously proposed models of collective motion with an explicit velocity–alignment interaction. We discuss the derivation of a coarse-grained description of the system dynamics, which allows us to derive analytically the necessary condition for emergence of collective motion. Furthermore, we analyse systematically the onset of collective motion and clustering in numerical simulations of the model for varying interaction strengths. We show that collective motion arises only in a subregion of the parameter space, which is consistent with the analytical prediction and corresponds to an effective escape and/or pursuit response.

scholarly journals Measuring Time

2018 ◽  
Vol 14 (1) ◽  
pp. 5296-5302
Author(s):  
Sydney Baldwin Self
Keyword(s):  
Special Relativity ◽  
Stationary Point ◽  
Space Station ◽  
Physical Characteristics ◽  
Time Dilation ◽  
Speed Of Light ◽  
Lagrange Point ◽  
Measuring Time ◽  
The Absolute ◽  
The Universe

The speed of light is an absolute, the measurement of the speed of light is not an absolute. According to Special Relativity, the rate at which a clock ticks is a function of the speed at which it is travelling through space; the faster the speed, the slower the rate. This is called time dilation. Time dilation is a function of the speed of an object through space. The faster an object is travelling the greater the time dilation. Because of time dilation, we are unable to measure the absolute speed of an object through space. We do not actually measure time. Instead we have instruments which measure the physical characteristics of instruments which are affected by time.  We then interpret these physical characteristics and this interpretation becomes our measurement of time. Our body is one of the instruments we use to measure time, but we also use various clocks. Time is not a characteristic of the universe; it is a construct which can be defined to have any value we choose. If we could establish a stationary point in space, it would be possible to: measure the absolute speed of light. measure the absolute speed through space of any moving object. establish a clock for absolute time. It might be theoretically possible to establish such a point, as follows: Assume a space station, located at a Lagrange point. Modify the speed of the space station through space for the x, y and z axes to maximize the speed of light. The location of the space station when the speed of light was maximized would be at a stationary point in space.

Back to the Twins

2018 ◽  
pp. 87-95
Author(s):  
Alvaro De Rújula
Keyword(s):  
Relative Velocity ◽  
Time Dilation ◽  
Twin Paradox ◽  
Consistency Test ◽  
Relativistic Time

A very detailed discussion on the Twin Paradox and its resolution(s). How science may be difficult for the (pioneering) scientists. Muons as the optimal clocks. Is the relativistic time dilation due to relative velocities or to accelerations? Lord Halsbury’s triplets. The paradox is not a paradox, but its enunciation contains a MacGuffin. Einstein’s theoretical consistency test. Some other experiments corroborating that relative velocity is “it,” not acceleration. The algebra behind the relativity of time requires a bit of algebra.

scholarly journals Gravitational Fields and Gravitational Waves

2021 ◽  
Author(s):  
Tony Yuan
Keyword(s):  
Gravitational Field ◽  
Gravitational Waves ◽  
Doppler Effect ◽  
Relative Velocity ◽  
Gravitational Force ◽  
Gravitational Equation ◽  
Speed Of Light ◽  
Gravitational Fields ◽  
Light Waves ◽  
The Doppler Effect

Abstract For any object with finite velocity, the relative velocity between them will affect the effect between them. This effect can be called the chasing effect (general Doppler effect). LIGO discovered gravitational waves and measured the speed of gravitational waves equal to the speed of light c. Gravitational waves are generated due to the disturbance of the gravitational field, and the gravitational waves will affect the gravitational force on the object. We know that light waves have the Doppler effect, and gravitational waves also have this characteristic. The article studies the following questions around gravitational waves: What is the spatial distribution of gravitational waves? Can the speed of the gravitational wave represent the speed of the gravitational field (the speed of the action of the gravitational field on the object)? What is the speed of the gravitational field? Will gravitational waves caused by the revolution of the sun affect planetary precession? Can we modify Newton’s gravitational equation through the influence of gravitational waves?

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