# Special relativity in Sinhala

In 1905, Albert Einstein published the theory of special relativity, Which discussing what’s relative and what’s absolute about time, space, and motion. This special relativity derived a fundamental link between space and time. The universe can be described as having three space dimensions and one time dimension.

If you move through space relative to another, the measurement that you make about space and time is not similar to the other person who make the measurements.

Let’s discuss that in very simple example in this video –

Einstein’s theory of relativity explains the physics paradoxes

Einstein’s relativity theory actually consists of two parts. The special theory of relativity in 1905 and general relativity from in 1915.

In the mid-1800s discovered natural phenomena conflicting to Newton’s theory of gravity. Many scientists worked to explain these discrepancies, but it was Einstein who hit the nail on the head.

Einstein’s theory of relativity proved to provide solutions to some of the phenomena that the researchers had not been able to match classical physics. The theory of relativity unified the three basic principles: gravity, electro-dynamics and thermodynamics.

What is Relativity?

The core idea of both theories (special relativity and general relativity) is that two observers moving relative to each other, often measuring different time and space intervals for the same events, but the laws of physics apply equally to both.

Prior to Einstein came to his conclusions; he had to make up some previous assumptions generally accepted in the scientific community.

The work began in the early 1900s and concluded in 1905 when Einstein published a series of articles in a physics journal. Among other things, he published an article that introduced his famous formula: E = mc2.

The special theory of relativity is based on two postulates:

1. The Principle of Relativity: The laws of physics are the same in all inertial frames of reference.

2. The speed of light is constant: The speed of light in vacuum has the same value for all frames of references.

The first statement means that no observer stands above any other when it comes to describing the physical processes – all motion is relative.

The second statement may seem odd. Speed of light is constant. Two observers move relative to each other will measure the same value of the speed of light, 299 792 458 m/s. Should they not rather measure a difference that corresponds to their relative speed? Experimentally, the answer is no, although this seems to be against all other observations. To explain these phenomena’s, we need to change the way that we understand the behavior of the universe specially time and space.