What is the Theory of relativity?

As a scientific notion, the Theory of relativity states that space and time are relative, and all motion must be relative to a frame of reference.

It was formulated by Albert Einstein, who sought to explain situations in which Newtonian physics fail to deal successfully with some phenomena, and in doing so proposed revolutionary changes in human concepts of time, space and gravity.

In fact it encompasses 2️⃣ theories:

✔️Special Relativity Theory, dealing with the structure of space-time

and

✔️ General Relativity Theory, stating that objects at rest in the gravitational field and accelerating are identical physically.

Study of relativity led to the emergence of one of the greatest formulas E = mc2, where E is Energy, m stands for mass and c for the velocity of light. This equation answers why the object’s mass increases with its velocity- something many scientists before Einstein had failed to explain.

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