Introduction to Physics

Unification of Forces In nature, we are familiar with different types of forces which have different names as well. But all these forces are not…

Comparison of the Intensities of Fundamental Forces: Among the four fundamental forces, strongest force is the strong nuclear force and weakest one is the gravitational…

The strength of the Fundamental Forces Among the four fundamental forces, strongest force is the strong nuclear force and weakest one is the gravitational force.…

Electromagnetic Force: The force between two charges is called electric force and that between two magnets is called magnetic force. But electric force and magnetic…

Fundamental Forces Suppose there is a book on a table. Let ‘something’ is applied on the book by hand to move the book. A ball…

Length Contraction according to the Theory of Relativity According to classical mechanics, whatever may be the velocity of the observer with respect to the object…

Lorentz’s Transformation On application of the transformation laws, the electromagnetic equations remain covariant from one frame of reference to another frame of reference. This law…

Galilean Transformation If two events occur simultaneously in two separate frames, then naturally two sets of coordinates will be obtained for the two frames. The…

Special Theory of Relativity and its Fundamental Postulates The fundamental postulates: In 1905, famous scientist Albert Einstein introduced the special theory of relativity. This special…

Einstein’s Theory of Relativity Newton considered space, time, and mass as absolute or independent; but Albert Einstein in his theory of relativity considered them as…