What is the main idea of Einsteins' relativity theory?

Question

E=MC2

Answer 1

Since you mention E=MC2, I assume your question refers to special theory of relativity. The main ideas here are

1. Speed of light is constant in every frame of reference. Put it simply, if you measure the speed of light, it will come out to be same whether you are moving or not, (or whether the source of light is moving or not).

2. Physical phenomenon ( events ) and their descriptions will be same for two observers ( or two sets of observers ) which are moving with constant velocity with respect to each other - Put it simply, if you take measurements of physical events and formulate a law, your friend moving at constant velocity w.r.t to you will observe the same event and his ( or her ) measurements of the event will be according to the same law.

From these two amazing hypothesis, Einstein set out to derive a set of results that essentially showed that time is not absolute, meaning in particular, concept of simultaneity of events -- two events happening at the same time, or happening with a gap of say 5 seconds -- really does not make sense. If you measure or observe that two events are simultaneous or have a gap of 5 seconds say, people in another frame or reference will not see them as happening simultaneously, or happening with a gap of 5 seconds !!! ( The amount of time by which the events will not be simultaneous or will not have a gap of 5 secs is usually small but measurable ).

Another result from the same considerations is that energy and momentum are interrelated in a very specific way which means that even a particle at rest has energy given by E = MC2. This of course also implies that matter can be transformed into energy and vice versa.

Hope this helps ....

Answer 2

The main idea is that ,

" The mass of a body moving with the velocity of light,is emitted as energy, which is governed by the equation E = MC2 and the value of the mass is not constant with regarding to a moving body , it increases otherwise"

Answer 3

The theory or relativity is very complicated. The VERY BASIC idea of relativity is this:

There is no prefered frame reference.

If I am standing still beside a train track and you are sitting at a window on the train as the train goes by at 80 miles per hour we would see each other in a different way. To me, you look like you're moving forward at 80mph. To you, you're sitting in one spot. You don't feel like you're moving forward at all. Instead, you look out your window and see me go by you backwards at 80mph.

The theory of relativity says that neither of us is right. The train really doesn't matter because both of us are on the face of a planet that is spinning at thousands of miles per second, in an orbit arround the sun, in a galaxy that is swirling, in a universe that is expanding. So the 80mph doesn't matter.

Other interesting facts that are proven by relativity:

The speed of light is always constant. If I am riding my bicycle at 10 miles per hour. And I throw a rock forward at 30 miles per hour, then the rock is really traveling at 40mph. So, if a car is traveling at 60 mph with the headlights on, is the light coming form the headlights going faster than the spead of light? (Speed of light + speed of the car) No. That's not possible.

Also, the faster an object goes, the shorter its lenght is. Yes. That's true. Someone inside the object could not tell, but someon watching the object could. The change is so small though, that it only becomes detectable as the object nears the spead of light.

E = MC^2 (squared) is a simplified formula that is derived from and proven by the theory of relativity. It states this:

Every object has stored energy inside. The amount of energy is equal to the mass of the object times the square of the speed of light in a vacuum.

THAT is the SIMPLE vesron. :) If you want to read more, follow this link - http://science.howstuffworks.com/relativity1.htm

Answer 4

The theory of relativity is very complicated but the main idea is that every thing in this universe is relative except the velocity of light which is absolute.
It also says that a moving body ages slowly than a stationary body, The mass of a moving body increases with increase in its velocity Mv=Mo/{1-v^2/c^2}^1/2.
thus nobody in this universe can attain the speed of light ie. 3*10^8 m/s

Answer 5

I think u ask about special relativity theory.? Einstein delivered two relativity theories. The first is special relativity theory.

The basic concept of special relativity theory is "Time is not an universal constant and nothing can reach the speed of light". This is the basic idea of special relativity theory.

He develop more postulates from this concept.

Answer 6

Einstein theory of relativity is based on
- their is no absolute frame of reference.
- Speed of light is the maximum speed that can be attained , and it is constant in all frame of references.
- mass and energy are interconvertible.
- if the speed of a body increases , its mass also increases, so to increase the speed further, the body needs more energy and it cannot reach the speed of light because for that the body need infinite energy and in our universe their is no infinite energy .
- by following these postulates he got the formula E=mc2

Answer 7

The above mentioned equation is showing that mass can be converted into energy and energy and be converted into mass.

E = MC2

E = energy obtained from mass m units
M = mass
C = speed of light

Einsteins' relativity theory says that "No object in this universe having some mass can travel with or beyond the speed of light".

if any object will travel with speed of light it's effective mass will become infinite.

m(effective) = m / sqrt(1- sqr(v/c))

if v = c then m (effective is infinite)
and if v > c the denominator will be not valid.

This all is valid and can be applied only for non- inertial frame of reference.

Answer 8

This is Einstien's formula to describe everything in the known universe. Relativity has to do with the idea that if you were in your car and throw up a ball and you're moving 60mph then to you the ball is just going up and down. to someone on the sidewalk the ball is giong up and down at 60mph. that's a hard concept to think of when it comes to some of the more complicated mechanics. but where e=mc2 comes in is that energy=massXspeed of light 2. Einstien figured out in his life (big deal) that time was not the universal constant, but the speed of light was. even time changes when dealing with the speed of light. Energy is the currency of nature. when you move down to it everything is made of energy. so what einstien is saying is that you can create mass by using energy you can create mass by using the universal constant.

Answer 9

This formula proposes that when a body has a mass (measured at rest), it has a certain (very large) amount of energy associated with this mass. This is opposed to the Newtonian mechanics, in which a massive body at rest has no kinetic energy, and may or may not have other (relatively small) amounts of internal stored energy (such as chemical energy or thermal energy), in addition to any potential energy it may have from its position in a field of force. That is why a body's rest mass, in Einstein's theory, is often called the rest energy of the body. The E of the formula can be seen as the total energy of the body, which is proportional to the mass of the body.

Answer 10

enable A be a table certain observer and B be a shifting observer with a source of sound/ gentle. textile medium is critical for the propagation of sound waves. hence, the speed of sound wave for the shifting observer will be diverse from the cost measured through the table certain observer. formerly the certain concept of Relativity, all were searching for some type of medium for the propagation of electro-magnetic waves. Like Sound waves, anybody envisioned that the speed of E.M. (gentle) waves to be diverse for A and for B. On at present no you may imagine of E.M. waves propagating with out any medium for propagation. If there have been the type of medium then the speed of E.M. waves could be diverse for A and for B. yet experiments executed to locate the type of medium failed. the outcomes were opposite to the expectations. At this degree Einstein postulated the certain concept of relativity. the significant postulates are A. No textile medium is critical for the propagation of E.M. waves. B. the speed of E.M. waves does not matter on the speed of the source generating them.Therfore, it really is a consistent. {it is the biggest postulate which became later experimentally commonplace to be most suitable) Now there are 2 issues to substantiate. a million. If length mass and time is the same for A and B, then the speed of E.M wave could be diverse for A and B 2. If “the speed of E.M wave is consistent” then the dimensions mass and time will matter upon the speed of A and B. this is the lenght and time will be replacing with the speed of the article. Now which one is a truth? Many experiments have proved that the 2d one is actual. And we ought to settle for that element mass and length are relative parts. when we manage speeds very decrease than the speed of E.M. waves those variations are disregarded and can't be perceived and our problem-free experience tempts us to trust the first even with the undeniable fact that truthfully the 2d one is actual. In uncomplicated % of goods we are not searching any distinction in time, length and mass. hence, it really is difficult for us to settle for the concept and understand it properly. even with the undeniable fact that it is not not ordinary to appreciate, if one knows that the speed of sunshine is the same for all shifting observers regardless of their %.