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Friends, I hope you all are well, today is Saturday and you all have a good day, and todays topic is Theory Of Relativity
One of the most well-known physicists in the world, Albert Einstein, presented the theory of relativity.
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Theory of Relativity Definition
It means to be relative to something. Theory is simply theory.
The theory of relativity in this context refers to viewing an object or living thing's activity in relation to another object or living thing.
It can be split into two sections. both the General (General) and Special (Special) Theories of Relativity.
Frame of reference: Inertial vs. Non-inertial
All objects in an inertial frame move in relation to one another continuously at the same speed. One object's speed does not change in relation to another's. The Newtonian first law of motion applies in this frame.
While accelerated motion is present in a non-inertial frame. In this frame, Newton's first law of motion is invalid.
Image by Gerd Altmann from Pixabay
General Theory Of Relativity
Only the inertial frame of reference allows the application of general theory. We start with an example to help you understand this. Let's say there is a car travelling at 30 kmph from east to west. Raj and Rohan are sitting in the car together. Furthermore, you are positioned by the side of the road. Raj is dependable for Rohan and is stationary. But they're both travelling at 30 kmph in the direction of you. They see you travelling east at 30 kmph. This trio of conclusions is accurate.
The frame of reference is the only distinction. Now, if Rohan throws a ball at a speed of 10 kmph in the direction of the west, the ball will travel at that speed for Rohan. However, you'll perceive that the ball is moving west at a speed of 40kmph (30+10(car + ball)).
We already know that light travels at a constant speed of 300,000 km/s. So, would we notice an increase in light speed if Rohan had set west ablaze? No. That can't be done.
Nothing in the universe can move more quickly than light. When something moves at the speed of light or faster, its relative speed adjusts to maintain a constant length and time. In English, this is referred to as time dialing and length contrast.
Slow time movement is referred to as time dialing. Whatever is moving so quickly will experience a slow passage of time. In other words, if you travel at the speed of light to another planet and then return, you will see what will happen to Earth in the future. When there is a length contradiction, the length of the rapidly moving object is calculated. Time is relative, not absolute, as this theory demonstrated. Each person experiences it differently.
Special Theory Of relativity
Only in the inertial frame does general theory hold true. However, there is no uniform speed in the universe. Everything moves quickly. In other words, the real world defies the general theory. A special theory of relativity was proposed in order to address this weakness.
Gravitation is a subject of this theory. There are three dimensions, which is a fact. Those are dealt with by x, y, and z. Time, according to Einstein, is the fourth dimension.
Consider spitting water on the ground. Thus, the water will disperse and assume various shapes in a short period of time. We can think of it as a moving picture that changes over time.
Imagine space-time as a stretched fabric with curves created by the weight (mass). The curve increases in size as the load increases. The curve appears to have been caused by gravity as well.
Light was also thought to move in a straight line. However, this theory demonstrated that light is flexible. Additionally, the light will bend more after striking a heavier object. We are able to see the stars behind the Sun because of the way light bends.
Amazingly, it was the finding that time and gravity are connected. Time moves slowly in places with a lot of gravity, like the Earth's core. Time also seems to move more quickly in places with less gravity, such as high mountains. This discovery led to the creation of the GPS system today.
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