optical mineralogy

Jun 28th, 2015
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Electromagnetic spectrum include Gamma rays, X-rays, UV rays, visible light, infrared and radiowave. The light is considered as waves of electromagnetic energy vibrating through the medium of other. The light is' a combination of seven different colours ranging in wave length from 700 m/u. 'for red and 410 m/u for violet

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GENERAL CHARACTERISTICS OF LIGHTElectromagnetic spectrum include Gamma rays, X-rays, UV rays, visible light, infrared and radiowave. The light is considered as waves of electromagnetic energy vibrating through the medium of other. The light is' a combination of seven different colours ranging in wave length from 700 m/u. 'for red and 410 m/u for violet (1 m/u = millionth of a millimeter). The light is visible because the waves of these lengths are capable of stimulating our optic nerves. In the transmission of light energy is passed on from one particle to the next, and so on. The Transmission takes place in the form of waves. There are motions in two directions. 1) In the direction of propagation there is an uniform rectilinear motion. 2) In the transverse direction the motion seems to take place around a circle with uniform velocity and in a straight line as a to and fro motion with periodic, variation of velocity. It moves from its original position with decreasing velocity. After reaching a point of maximum displacement it returns with increasing; velocity to its original position, Again it moves with decreasing velocity until it reaches a displacement equal and opposite in direction and' returns. The motion is called periodic motion or vibration or harmonic motion. A combination of these two motions', harmonic and rectilinear, prevails in the form of a curve wave form. This curve is celled a simple harmonic curve.All the horizontal sections o

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