Today we’ll learn : 1. Interchange of energy between potential energy and kinetic energy 2. Internal energy 3. transformation of energy 4. Heat energy 5. The sun as a source of energy 1. Interchange of energy between potential energy and kinetic energy : A swing pendulum […]
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Einstein’s Achievements
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 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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The discovery of quantum mechanics (Photon)
The discovery of quantum mechanics (Photon) Photon First, we need to know : 1. Electromagnetic radiation: The energy of photons, having properties of both particles and waves. The major wavelength bands are, from short to long: cosmic, ultraviolet, visible or “light,” infrared, and radio. 2. Quantum: The amount of radiant energy […]
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Einstein’s theory of general relativity , and Einstein’s theory of photoelectric effect
Einstein’s theory of general relativity : The interactions of mass (as related to gravitational force) are really the influence of bodies (masses) on the geometry of space and time. Space and time are affected by gravity. This theory is grounded on two main ideas: that the speed of light is a universal constant in […]
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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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Einstein’s Achievements ( Part : 1 )
· Einstein’s theory for Brownian motion: The motion of tiny particles suspended in liquid is caused by the kinetic energy of the liquid’s molecules. In 1827 the Scottish botanist Robert Brown (1773–1858), while using a microscope, observed that pollen grains suspended in water were in constant motion, which he supposed was caused by some […]
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