The theory of relativity and its use in Sci-Fi

This investigation looks in to the different aspects of general and special relativity possibility that has been used in science fiction films. This report talks well-nigh the difficulties and possibilities of blend at the speed of kindling (c), the different propulsion systems that could be used and how trecknology has changed the boundaries of physical science in Hollywood features. Time travel as well as features looking at different theories behind it with a build of upstart ideas.The Foundations of relativity were set out in detail by Albert Einstein. The special variation of the theory, which applies to observers in a uniform relative exploit, has led to a number of successful conclusions of a variety of effects. Newtons laws of motion give us a comp permite description of the behaviour of moving objects at low speeds (speed of objects practic all toldy less than the speed of ignition). These laws being thought up in the seventeenth century, when the classical law s of dynamics where being formulated by different first physicists, these classical laws are themselves subject to a relativity principle.Einsteins special theory of relativity gives the motion of particles moving at close to the speed of ignition. It actually gives the motion of any particle. This does not however prove Newton vituperate his compares are within Einsteins relativistic comparisons.Einsteins theory of special relativity is ground on both supposals1. All inertial (i.e. non-accelerating) frames of reference are equally effectual (i.e. any observations or experiments performed entrust produce equally valid results).2. The speed of light is constant for all inertial frames of reference.Given these two statements, Einstein showed how definitions of momentum and free energy must be refined and how quantities much(prenominal) as continuance and cartridge holder must change from one observer to another in order to get consistent results for physical quantitie s. acquaintance fiction has for years tried to incorporate the theories that govern the reality of physics within their programmes, to keep those die hard science fiction fans happy. lore fiction has been subject to cult following for many years and in many countries, although no matter how hard they try there are a number of important facts that nabm almost popular to overlook, the of import one being travelling at the speed of light. Many programmes puddle some sort of light propulsion, warp drive and travel to other universes. But can this really be done?Many physicists all over the world have tried to find out if travelling faster than the speed of light is possible without violating relativity. We do know that is infeasible to accelerate forever, because the immediate to the speed of light we get the caboodle tends to infinity this means that there would need to be an infinite amount of energy needed to push us past this speed barrierThis equation represents what would happen to mickle when relativistic speeds are reached. Here, m is the mass, of an object at rest m is the value for the moving reference frame. As you get close at hand(predicate) to the speed of light the product at the bottom of the equation gets closer to zero so this means that m/m tends to infinity. If you were to rearrange this equation so to get the value of m the same results are seen.The increase in mass, however, is beat understood not as a change in mass but as a change in the relationship of mass and momentum. Momentum (p) is the product of mass x stop number. Here, p is the relativistic momentum and m is the rest mass.Once again we can see that the momentum this time will tend towards infinity as we reach the speed of light. use one of Einsteins most famous equations E = mc2 we can now see that if the mass does tend towards infinity that an infinite amount of energy will be needed to remain at constant velocity let alone accelerate.Time dilation is another consequen ce of travelling at relativistic speed. Weve all heard about the touch paradox if one duplicate went on a space journey at 99.5% the speed of light and returned in what he judged to be 4 years the other twin with have aged by 40 yrs These effects cannot be seen with humans, and it has been tested and seen to occur with particles at the atomic scale. So any sci-fi movie where the astronauts return home after visiting other galaxies after travelling at the speed of light is clearly impossible, if they had been travelling for any length of time they would have probably come back to their grandchildren.To explain this if you could regard a spacecraft with a light source perpendicular to the motionIf there were an observer on the spacecraft and the light travelled 0.6m it would collect 2 nanoseconds to travel that aloofness. By using a simple equation speed = distance/ time the light is travelling speed = 0.6 x 210-9 = 3108 ms-1 this should not come to as a storm as this is the sp eed of light. However if the observer then was then stationary with the spacecraft moving past them, they would see the light take this advocateNow in pre-relativistic (Newtonian) physics, both observers record the same period of time. Consequently, the velocity recorded by the two observers is different the Earth-bound observer would record a greater velocity for the beam of light.But taking into account Einsteins assumption that the speed of light doesnt change, and is the same for both observers, the distance for the light to travel doesnt change as it is not in the direction of travel, the time which the light takes obviously changes. Does this then mean there is no such affaire as absolute time?The distance that would have been observed for the light to travel would have been 1m so using the equation time = distance / speed, time = 1 / 3108 = 310-9 s, so we can desist the clock on the space craft is slower than that when stationary.This is given by the equationIf v