Polarization of Light and Laws of Malus: A Comprehensive Guide
Delve into the fascinating world of light polarization, with insights on transverse waves, representations of polarized and unpolarized light, the Law of Malus, practical experiments, Brewster's Law, and more. Discover the essence of electromagnetic waves, the nature of light, and the significance of the electric field vector in this detailed exploration.
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Presentation Transcript
Polarization of light Topic to be covered . Introduction Mechanical and optical experiment to demonstrate transverse waves Representations for polarized light and unpolarized lights Law of Malus Some solved problems on Laws of Malus Polarization by reflection Brewester s Law Polarization by refraction (Pile of Plates)
Polarization of light The phenomenon of Interference and diffraction established the wave nature of light. However these phenomenon do not prove whether light has transverse wave nature or longitudinal wave nature. Phenomenon, polarization is exhibited by transverse waves. Hence polarization of light proves the transverse nature of light waves.
EM wave is.. Light is an electromagnetic wave. It consists of vibrations of electric field and magnetic field. The electric field and magnetic field are perpendicular each other and in phase. EM wave is a transverse wave. The speed of EM wave is 3X10^8 ms^-1
Polarized Light Unpolarized light Superposition of many beams, in the samedirection of propagation, but each with random polarization. Polarized light Vibrations lie on one single plane only.
Law of Malus Statement:- Its states that when a completely plane polarized light is incident on the analyzer, then the intensity of light emerging from the analyzer is proportional to the square of cosine of the angle between plane of polarizer and plane of analyzer. I= Im Cos^2 Where, I= Intensity of transmitted light from analyzer. Im= Intensity of PPL incident of polarizer and analyzer.
