The Real Reason for Gravity

The theory of 4-dimensional space time is in my opinion has the deepest implications and meanings. Everything denied by most rational human beings being proved to be true by this theory for example fate and destiny many of us would like to believe that our fate , our future is not fixed but this theory of a 4-dimensional spacetime implies that our future is not only fixed but is already existant , the very instant we see that space and time inter link to form something much more elegent and beautiful which also happens to be the nature of true reality, we also understand for sure that the past , the present , the future are of equal meaning . But I am not writing this post about the implication of the spacetime theory on time but to explain gravity through this model of reality called spacetime.

it as an experimental fact that gravitational forces influence time . for example i will write about an experiment , now it is in common knowledge that gravitational force acting on an object near the surface of the earth will be more than the gravitational force acting on the same object away from the surface of the earth . So two very precise atomic clocks were taken , these clocks were identical in every way mass , shape , size no aspect of one of the clocks differed from the other.Both of the clocks were started together one of the clocks was taken to a plane which travelled around the world once while the other was kept in laboratory . After the world tour of the other clock was over, they were brought to the laboratory and the time on the both the clocks was compared and it was found that the clock which stayed in the laboratory was a few billionths of a second behind the clock which took the world tour, this means that time near the surface is slower than time away from it.
In his general relativity Albert Einstein showed that mass and energy bend space time like a heavy ball kept on a trampoline ,(if we look at it from a 2-d point of view) but in from the 4-d spacetime if you remove time(one of the 4 dimentions) then this is what the earth (or anything for that matter) does to space(I am just using this sentence to explain ,space and time seperately have no meaning)

and as in the trampoline case everything follows those bends caused by the ball which we feel to be the force of gravity . Now you must all be thinking that "if gravity is not really a force so why do the planets revolve around the sun according to newton's first law (which works in all other cases), we need a force to move planets in circular path , it cant simply be wrong?" no it isn't wrong see, the different objects bend spacetime and a straight line in a curved spacetime is a curved line , thus the orbits of planets are actually straight lines in a spacetime zone which is curved. Thus no law is broken and gravity has been explained!!

Now as gravity is bending the spacetime and not just space we see the effect of time dilation , gravity is bending time itself(i am just using this sentence to explain the effects of time dilation , space and time seperately have no meaning). This effect is what is causing the atomic clocks to go at different rates.

Here Comes Li-Fi!, This Is Gonna Amaze you!

Harald Haas, a teacher at university of Edinburgh(UK) introduced his audience with 'Li-Fi' at a TED Talk. It was an idea of "transferring information/data through light".

Today, Wi-Fi(Wireless Fidelity) is the most widely used internet connection and it makes up nearly 60% of global internet traffic. It was accidentally created during an experiment. But there's still some issues with it, it lags sometimes, sometimes there's a problem in connection and the worst of all anyone can pick the connection(it travels through walls).

The average internet speed is 23.5 Mega bits per second. South Korea has the highest internet speed where the highest was recorded at 100mbps.
Wi-Fi uses radio waves which have a frequency of 3Khz up to 300Ghz which is low compared to the frequency of the visible spectrum(visible light) which is from 430Tera Hertz to 770Tera hertz which is more than 10,000 times larger than normal radio wave frequency.

Thus, Light Fidelity(Li-Fi) was invented. It transmits data using LED light bulbs.  All we need to do is replace our normal fluorescent lights with the LED's. It can transmit data 100x faster than our normal internet speed, nearly at 100Gbps. It doesn't stop there, researchers from Oxford university have recorded speeds of 224Gbps with which we can download 18,  1.5Gb movies in 1 second.

We just need to have our LED lights at our ceiling/anywhere on and it will start transmitting data in your home/office anywhere. It sends information by blinking at different rates(human eye will not be able to recognize the blinking).

Here's the TED Talk Video in which Harald Haas demonstrates the new Li Fi.

He transmits an HD video just using light waves

The company pureLifi has collected funds over $2 million around December,2015 and is going to launch their first ever dongle which runs Li-Fi. They have named their product Li-Fi-X. They will release their product near March 2016.

This product is going to change the world. It will be cheap light powered internet. It can lead to a situation where all electronic devices communicate with each other. If Li-fi is available widely, it will revolutionize technology and transfer of information will no longer be an obstacle for an average user.

Amazed!?, We too.To keep up with updates keep visiting Multixy!

 

The weird nature of reality

Quantum physics plays a very important role in our lives , even though its implications elude our common experience without the advancements in quantum physics life as we know it would be over , the computer I am using to write this would not exist , the network you are using to read this would not exist , no phones ,camera , not even tv. Now that I have established that there is no ignoring quantum effects ,I will discuss about the most basic and  very bizarre quantum effect that is the uncertainty principle

Imagine that a dog has been tied to a tree with a 5m rope, and I tell you to close your eyes and set the dog moving and ask you to tell me the position of the dog you will say that the dog is at any point inside the circle with the tree as the centre and the radius of 5 metres and you will be right the dog is at a particular position in that circle you just cant see it . Now let us replace the dog with a particle let us say that the some how it has been confined in such a way that the farthest it can be from the tree is 5 metres and i ask you to close your eyes and tell me the position of the particle you will again say that it at a point in that 5 metre radius around the tree but this time you will be absolutely wrong , the answer would be that the particle is everywhere in that 5 metre radius around the tree . the instant you measure its position it will come to a definite position inside that circle but now that you have measure its position precisely there is no way to know its velocity ,not because you don’t have the equipment but because nature has forbidden you to ,the very statement of knowing the position and the velocity of a particle has no meaning and it is absurd to think it that way , and if you precisely measure the velocity of this quantum particle then the particle could be any part of the universe rendering the confinement useless . This is the uncertainty principle . 

the velocity and position both of a quantum particle cannot be known , precisely knowing of one will give infinite values to the other and before any measurement is made on the particle the particle has several values of both positions and velocity at the same time.The implications of this principle are profound , this means that the nature of reality is entirely dependent on the observations made by an observer . 

Now you must be wondering that why don't we observe this in our daily lives since we are made of particles? here is the answer this strange thing happens because of something called the wave-particle duality it is established in quantum physics that matter also behaves as a wave and thus has a wave length which is inversely proportional to the momentum of the object concerned the momentum of a particle is very very less as its mass is very less thus it behaves as such, and anything we handle in our daily life is comparatively very heavy thus has huge momentum thus the wave-length is negligible and thus this strange behaviour is negligible .

A $4 smartphone?What!

19 February, 2016, an Indian smartphone brand 'Ringing Bells' launched a phone named Freedom251 for registrations(pre-order) at an unbelievable cost of $4(Rs.251) with features of phones which cost at-least $90-$100(Rs.5000-Rs.6000). It is indeed the world's cheapest smartphone. Ringing bells says it has more than 650 service centers all over India. On February 19th , registrations were to start at 6 A.M.(IST) but the site crashed due to the number of visitors and the registrations was delayed 24 hrs. It had unimaginable number of registrations,more than 70 bookings. The company said the original cost for the phone was $26(rs.1719) but they were not working for profit. The surprising thing is they haven't started the manufacturing yet. They will also be sending 5000 units each to 100 distributors.

 

 Let us tell you about the specifications of the phone:

1. 1GB RAM
2. 3G enabled
3. 8GB Internal Storage
4. Android 5.1 Lollipop
5. 1.3 GH z Quad core processor
6. 3.2 MP rear camera
7. 0.3MP Front camera
8. 1450 mAh battery

Surprised? We too. Keep visiting us for updates.

The recent tragedy of India

Recently it has been exposed that patriotism is in short supply in India.We have students of universities protesting against the hanging of the master-mind of the attacks on the parliament of India Afzal Guru a terrorist .Catching and killing of this man was very important as he put a question mark on India's ability to check criminals, the fact that it took around 12 years to hang him which is shameful very shameful indeed but it is never too late to mend and it is splendid that he was finally hanged.

the leader of the un-patriotic bunch

Recently came the anniversary of this hanging ,on that very fateful day some non -patriotic students decided to protest against the hanging of a man who wanted to harm their country. These protests started in the JNU and spread to Jadavpur university . The students audaciously give violent slogans like "bandook ke dam pe aazadi"(meaning 'freedom at the cost of weapons') which show criminal intent utter dis-regard for India and everything it stands for.

What's sad is some politicians see fit to their selfish interests to support these students . All the debates show politicians bickering against the BJP the main party of the ruling alliance NDA , these protests pose a serious threat to the country and all these opportunistic politicians don’t care and are only worried about their selfish gains, this is what exceedingly pains me , in such a grievous situation the country is not uniting

to remind the students of their original country and how much they owe it , the tricolour rule has been established which states that all government universities should have an Indian flag in their campus which is proudly visible from anywhere in the campus . This was the perfect rule and solution to the problem , it wasn’t harming anyone and was also showing that Indians are proud to be Indians 

But still there were disgraces who were not happy with this idea for example professor Imankalyan Lahiri of the jadavpur university who was openly against the idea when asked why was he not happy with this idea even though it was nationalist he audaciously said “Nationalism is not as same as destruction” thereby openly claiming that the hoisting of the Indian flag in each college was destruction which very hypocritical as professor Lahiri earns his living by teaching in a college that was set-up to aid the Indian  national movement .

Professor Lahiri

The mis-conception of time

In the theory of special relativity Albert Einstein explained the relativity of motion and time.We all know motion is relative, suppose you are sitting in a moving train you will observe that the seats or the co-passengers are not moving, but a person outside will say that you are all moving the seats, the passengers and the train, so now we have established that motion of a body is not absolute and that it depends on the observer observing it. 

Let us modify the situation the train is moving at the speed of 2m/s and you are inside throwing a ball inside with a velocity 2m/s in the same direction as the motion of the train. An observer inside will note that the velocity of the ball is 2m/s and an observer outside will note that the ball is moving at the velocity 4m/s(speed of the train with respect to an observer outside + speed of the ball with respect to the train ). Now let us replace the ball with a beam of light by the earlier logic used one would expect that with respect to the observer outside the speed of the beam should be more when compared to the speed of the beam with respect to the observer inside. 

 Here is the punchline it has been experimentally found that the speed of light is same for all observers, moving at different speeds at different places, thus in this case the speed of light is same for both observers, the time taken is same but the distance traveled is not, this is absurd unless speed of time for both observers is different this was a very radical proposal made by Einstein. Time runs slowly for the faster body. So he combined all 3 dimensions of space and one dimension of time to make a solid block of space time.

Now that we have established that time is not absolute but relative, I will tell something even more mind blowing .This unification of space-time suggests something much deep, we are used to thinking of space which evolves with time the space-time is something in which all events in time are together and there is no evolution just a solid 4 dimensional block of space-time in which the past is not over, the future is not only fixed but is already existing , the present as same as the same meaning as past or future in reality .