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a) You are travelling in a rocket in a totally vacant universe. The rocket is travelling at 100 m.s-1 and accelerates at 10g for 3 minutes. How fast are you travelling at the completion of this time? You are to argue this in a philosophical vein in no more than 150 words. Your words are to be used for a "sound grabs" for a current affairs programme introducing the general public to the special Theory of relativity.
b) The Special Theory of Relativity predicts that a space traveller, travelling at velocities close to the speed of light will experience time passing more slowly than his earth-bound partner. Your task is to draw a space-time diagram depicting the following situation. A twin is sent on a space flight at a velocity of 0.9c for a period of a year while his sibling remains on earth. The date of the launch is 31/12/08 at midnight and his return is exactly one year later. At midnight on June 30th he radios his brother for a mutual birthday chat tells him that he is returning to Earth instantly. Show clearly on your diagram the path of the rocket, the path of the earth and the path or the radio conversation (radio waves are electromagnetic radiation travelling at the speed of light).
Fibre optics: Light travels in straight lines, even though lenses and mirrors can deflect it, light still travels in a straight line between optical devices. This is fine for
Do fiber optic transmits the radiation? Light is a radiation; hence, the answer is yes. Several fibers, depending upon the nature of the materials from that they are made, tran
Static limit: The distance through a rotating black hole where no observer can probably remain at rest (w.r.t. the distant stars) due to inertial frame dragging; this region i
What the angles among the direction are of travel of light the electric field and the associated magnetic field? Answer: The magnetic field created by a changing electric
The idea that everything is made up of very small particles has been developed over many years supported by several experiments: (i) Brownian motion :
is there any way to photodissociate explosives or bullet so that it can not fired
A sodium cation has different number of electrons from: (1) O 2- (2) F - (3) Li + (4) Al +3 Ans: Li +
This spray head discharges water (density 62.4 lbm/ft ) at a rate of 4 ft /s. Assuming irrotational flow and an efflux speed of 65 ft/s in the free jet, determine what force acting
describe the principle, construction and working of Michelson Interferometer.
A rectangular rosette is mounted on a test structure as shown, loads are applied, and the following strains are measured by strain gage elements 1, 2, and 3: ε 1 = 1500 μm/ m ε
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