Write an essay on 200 words of the following topics:
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CLASICAL PHYSICS
according to Newton and Galileo time travel is possible by changing the inertial frame of refrance with fundamental physical quantities like mass , time , length etc.
MODERN PHYSICS
according to Einstein and theory of relativity time travel is possible.
during research on time travel scientists tried to research on travelling in past and they got success when they got discovered worm holes
first we will discuss about what is wormhole.
actually there are 10 dimensions in our universe but we can see upto 3dimensions only.
lets take an example
suppose you are moving in. a car
if you are travelling straight then thats 1st dimension.
if you move left and right too thats 2nd dimension
if there is a mountain and you go through mountain then Thats 3rd dimension.
means.
0D means a point
1D means having length
2D means having length and breadth too
and.
3D means having length, breadth and height.
but there is also type of length which we can't see thats the length of time.
thats called four dimensional space time.
now come to the topic.
as we know nothing is totally smooth in this universe means all the things are rough means there will be hole in everything.
and we know time is also a physical quantity .
means time have also some holes
that holes called wormhole.
and if any object travel through wormhole they can go in past.
but they are too small even then quark and bosons.
and if any one will do time travel to past then there will be the situation called paradox
(virodhabas)
means
suppose you travelled in past and
you killed yourself.
but you died in past so how can you be in present.
and who killed you because you died in past.
thats called paradox (virodhabas)
so no one can travel in past.
but we can travel in. future.
According to theory of general relativity
Time varries because of mass.
means when object is near a very heavy object or things then time slows down there but that need very large amount of mass.
means thats should be a big planet but it can't slows down time more because it is very lighter for doing long time travel .
but there is one thing in universe which is heaviest thing in this universe thats a big black hole.
if any spacecraft revolve around a big black hole it can travel time.
we can also find how much we travel time by a formula
T=t0/√1-v²/c²
but doing this we can't travel more in future
and this is dangerous also as if spacecraft falls in black hole it will destroyed
but there is also another method.
according to theory of relativity
nothing can travel higher than the speed of light.
and any object will travel at that speed then the physical law will stop them.
means any object. can travel 99.99% of speed of light but not 100%.
so we can use this
if any object will travel close to speed of light then that object will travel time.
When any object moves with speed of light time stops for that object in order to maintain physical laws
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Secondary School English 5 points
Write an essay in about 200 words on any one of the following topics
Ask for details Follow Report by Theheartbroken 04.05.2016
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" ALL THAT GLITTERS IS NOT GOLD"
Outward appearance can be greatly misleading. Gold is a very valuable metal.
It has an attractive glittering appearance too. But it does not mean that everything which glitters like gold should be precious.
There are utterly valueless things that look like gold and taking them on their face value is unwise.
On the contrary, some of the dull looking things possess immense value. Their appearance is in no way proportionate to the great value they have. This is true of human beings also.
A person may be good looking having an attractive character. But he may not possess any real ability or talent. He can even turn out to be unscrupulous too.
A man must be judged on the basis of his abilities and not on his external appearance. Many of the truly good and great men are humble.
Goodness and perfection do not go with gaudiness.
Like shining glass pieces which dazzle and glitter like diamonds the appearance of men can be greatly misleading.
Therefore estimation and analysis of people on the basis of mere appearance is an unwise approach.
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