Where there are no opposing forces, a moving body needs noforce to keep it moving with a steady velocity ( Newton’s first law of motion ). If, however, a resultant force does act on a moving body in the direction of its motion, then it will accelerate ( Newton’s second law of motion ) […]
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Special relativity
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This video demonstrates Newton’s First law of motion : This video demonstrates Newton’s Second law of motion : This video demonstrates Newton’s Third law of motion : This video demonstrates : Special relativity Magnetic Fields Illustration.wmv
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RELATIVITY AND ELECTROMAGNETISM ( Electromagnetic Waves )
Maxwell’s theory for electromagnetism: Magnetism and electricity produce energy waves, which radiate in fields with differing wavelengths. The most dramatic moments in the development of physics are those in which great syntheses take place, where phenomena which previousely had appeared to be different are suddenly discovered to be but different aspects of the same […]
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EQUIVALENCE OF MASS AND ENERGY
Einstein put forward new ideas regarding the relationship between space, time, mass and energy which have come to be known as the the theory of relativity . See post Einstein’s Achievements ( Part :2 ) . It had long been accepted that matter could not be destroyed. This assumbtion was expressed in the law […]
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The explanation of special relativity & its results (part3 )
Relativistic linear momentum and the Relativistic form of Newton’s laws First, recall that the law of conservation of linear momentum states that when two isolated objects collide, their combined total momentum remains constant. Suppose that the collision is described in a reference frame S in which linear momentum is conserved. If we calculate […]
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The explanation of special relativity: Length Contraction-The Relativistic Doppler Effect
Length Contraction The proper length Lp of an object is the length measured by someone at rest relative to the object. The length of an object measured by someone in a reference frame that is moving with respect to the object is always less than the proper length. This effect is known as […]
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The explanation of special relativity and its results
Concerning the theory, Einstein wrote: “ The relativity theory arose from necessity, from serious and deep contradictions in the old theory from which there seemed no escape. The strength of the new theory lies in the consistency and simplicity with which it solves all these difficulties .. “ It is essential to recognize that Einstein […]
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Einstein’s theory of special relativity and Einstein’s principle of gravity
Einstein’s theory of special relativity : 1) Physical laws are the same in all inertial reference systems. 2) The speed of light in a vacuum is a universal constant. 3) Measurement of time and space are dependent on two different events occurring at the same time. 4) Space and time are affected by motion. […]
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